diff --git a/src/main/java/eu/siacs/conversations/ui/adapter/MediaPreviewAdapter.java b/src/main/java/eu/siacs/conversations/ui/adapter/MediaPreviewAdapter.java
index 73117143e..e830b85d3 100644
--- a/src/main/java/eu/siacs/conversations/ui/adapter/MediaPreviewAdapter.java
+++ b/src/main/java/eu/siacs/conversations/ui/adapter/MediaPreviewAdapter.java
@@ -17,6 +17,7 @@ import android.widget.ImageView;
 
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.concurrent.RejectedExecutionException;
 
@@ -29,6 +30,15 @@ import eu.siacs.conversations.ui.util.StyledAttributes;
 
 public class MediaPreviewAdapter extends RecyclerView.Adapter<MediaPreviewAdapter.MediaPreviewViewHolder> {
 
+    private static final List<String> DOCUMENT_MIMES = Arrays.asList(
+            "application/pdf",
+            "application/vnd.oasis.opendocument.text",
+            "application/msword",
+            "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
+            "text/x-tex",
+            "text/plain"
+    );
+
     private final ArrayList<Attachment> mediaPreviews = new ArrayList<>();
 
     private final ConversationFragment conversationFragment;
@@ -64,7 +74,7 @@ public class MediaPreviewAdapter extends RecyclerView.Adapter<MediaPreviewAdapte
             } else {
                 final String mime = attachment.getMime();
                 if (mime == null) {
-                    attr = R.attr.media_preview_file;
+                    attr = R.attr.media_preview_unknown;
                 } else if (mime.startsWith("audio/")) {
                     attr = R.attr.media_preview_audio;
                 } else if (mime.equals("text/calendar") || (mime.equals("text/x-vcalendar"))) {
@@ -75,8 +85,10 @@ public class MediaPreviewAdapter extends RecyclerView.Adapter<MediaPreviewAdapte
                     attr = R.attr.media_preview_app;
                 } else if (mime.equals("application/zip") || mime.equals("application/rar")) {
                     attr = R.attr.media_preview_archive;
+                } else if (DOCUMENT_MIMES.contains(mime)) {
+                    attr = R.attr.media_preview_document;
                 } else {
-                    attr = R.attr.media_preview_file;
+                    attr = R.attr.media_preview_unknown;
                 }
             }
             holder.binding.mediaPreview.setImageDrawable(StyledAttributes.getDrawable(context, attr));
diff --git a/src/main/res/drawable-hdpi/ic_help_black_48dp.png b/src/main/res/drawable-hdpi/ic_help_black_48dp.png
new file mode 100644
index 000000000..645822e83
Binary files /dev/null and b/src/main/res/drawable-hdpi/ic_help_black_48dp.png differ
diff --git a/src/main/res/drawable-hdpi/ic_help_white_48dp.png b/src/main/res/drawable-hdpi/ic_help_white_48dp.png
new file mode 100644
index 000000000..d49181785
Binary files /dev/null and b/src/main/res/drawable-hdpi/ic_help_white_48dp.png differ
diff --git a/src/main/res/drawable-mdpi/ic_help_black_48dp.png b/src/main/res/drawable-mdpi/ic_help_black_48dp.png
new file mode 100644
index 000000000..d3542c6bc
Binary files /dev/null and b/src/main/res/drawable-mdpi/ic_help_black_48dp.png differ
diff --git a/src/main/res/drawable-mdpi/ic_help_white_48dp.png b/src/main/res/drawable-mdpi/ic_help_white_48dp.png
new file mode 100644
index 000000000..2d11cf47a
Binary files /dev/null and b/src/main/res/drawable-mdpi/ic_help_white_48dp.png differ
diff --git a/src/main/res/drawable-xhdpi/ic_help_black_48dp.png b/src/main/res/drawable-xhdpi/ic_help_black_48dp.png
new file mode 100644
index 000000000..7c4823055
Binary files /dev/null and b/src/main/res/drawable-xhdpi/ic_help_black_48dp.png differ
diff --git a/src/main/res/drawable-xhdpi/ic_help_white_48dp.png b/src/main/res/drawable-xhdpi/ic_help_white_48dp.png
new file mode 100644
index 000000000..8eb7241da
Binary files /dev/null and b/src/main/res/drawable-xhdpi/ic_help_white_48dp.png differ
diff --git a/src/main/res/drawable-xxhdpi/ic_help_black_48dp.png b/src/main/res/drawable-xxhdpi/ic_help_black_48dp.png
new file mode 100644
index 000000000..1bd9ac560
Binary files /dev/null and b/src/main/res/drawable-xxhdpi/ic_help_black_48dp.png differ
diff --git a/src/main/res/drawable-xxhdpi/ic_help_white_48dp.png b/src/main/res/drawable-xxhdpi/ic_help_white_48dp.png
new file mode 100644
index 000000000..0d1404dd8
Binary files /dev/null and b/src/main/res/drawable-xxhdpi/ic_help_white_48dp.png differ
diff --git a/src/main/res/drawable-xxxhdpi/ic_help_black_48dp.png b/src/main/res/drawable-xxxhdpi/ic_help_black_48dp.png
new file mode 100644
index 000000000..2d37e2015
Binary files /dev/null and b/src/main/res/drawable-xxxhdpi/ic_help_black_48dp.png differ
diff --git a/src/main/res/drawable-xxxhdpi/ic_help_white_48dp.png b/src/main/res/drawable-xxxhdpi/ic_help_white_48dp.png
new file mode 100644
index 000000000..5f7f71fd3
Binary files /dev/null and b/src/main/res/drawable-xxxhdpi/ic_help_white_48dp.png differ
diff --git a/src/main/res/values/attrs.xml b/src/main/res/values/attrs.xml
index 03e8c0d92..627b3a970 100644
--- a/src/main/res/values/attrs.xml
+++ b/src/main/res/values/attrs.xml
@@ -52,7 +52,7 @@
     <attr name="icon_alpha" format="float"/>
     <attr name="delete_icon_alpha" format="float"/>
 
-    <attr name="media_preview_file" format="reference"/>
+    <attr name="media_preview_document" format="reference"/>
     <attr name="media_preview_recording" format="reference"/>
     <attr name="media_preview_audio" format="reference"/>
     <attr name="media_preview_location" format="reference"/>
@@ -60,6 +60,7 @@
     <attr name="media_preview_app" format="reference"/>
     <attr name="media_preview_calendar" format="reference"/>
     <attr name="media_preview_archive" format="reference" />
+    <attr name="media_preview_unknown" format="reference" />
 
 
     <attr name="icon_add_group" format="reference"/>
diff --git a/src/main/res/values/themes.xml b/src/main/res/values/themes.xml
index 449cae4e6..054a66e83 100644
--- a/src/main/res/values/themes.xml
+++ b/src/main/res/values/themes.xml
@@ -63,7 +63,7 @@
         <item name="dialog_horizontal_padding">24dp</item>
         <item name="dialog_vertical_padding">16dp</item>
 
-        <item type="reference" name="media_preview_file">@drawable/ic_description_black_48dp</item>
+        <item type="reference" name="media_preview_document">@drawable/ic_description_black_48dp</item>
         <item type="reference" name="media_preview_recording">@drawable/ic_mic_black_48dp</item>
         <item type="reference" name="media_preview_audio">@drawable/ic_headset_black_48dp</item>
         <item type="reference" name="media_preview_location">@drawable/ic_room_black_48dp</item>
@@ -71,6 +71,7 @@
         <item type="reference" name="media_preview_app">@drawable/ic_android_black_48dp</item>
         <item type="reference" name="media_preview_calendar">@drawable/ic_event_black_48dp</item>
         <item type="reference" name="media_preview_archive">@drawable/ic_archive_black_48dp</item>
+        <item type="reference" name="media_preview_unknown">@drawable/ic_help_black_48dp</item>
 
         <item type="reference" name="icon_add_group">@drawable/ic_group_add_white_24dp</item>
         <item type="reference" name="icon_add_person">@drawable/ic_person_add_white_24dp</item>
@@ -173,7 +174,7 @@
         <item name="dialog_horizontal_padding">24dp</item>
         <item name="dialog_vertical_padding">16dp</item>
 
-        <item type="reference" name="media_preview_file">@drawable/ic_description_white_48dp</item>
+        <item type="reference" name="media_preview_document">@drawable/ic_description_white_48dp</item>
         <item type="reference" name="media_preview_recording">@drawable/ic_mic_white_48dp</item>
         <item type="reference" name="media_preview_audio">@drawable/ic_headset_white_48dp</item>
         <item type="reference" name="media_preview_location">@drawable/ic_room_white_48dp</item>
@@ -181,6 +182,7 @@
         <item type="reference" name="media_preview_app">@drawable/ic_android_white_48dp</item>
         <item type="reference" name="media_preview_calendar">@drawable/ic_event_white_48dp</item>
         <item type="reference" name="media_preview_archive">@drawable/ic_archive_white_48dp</item>
+        <item type="reference" name="media_preview_unknown">@drawable/ic_help_white_48dp</item>
 
         <item type="reference" name="icon_add_group">@drawable/ic_group_add_white_24dp</item>
         <item type="reference" name="icon_add_person">@drawable/ic_person_add_white_24dp</item>