diff --git a/gallery_dl/extractor/imagebam.py b/gallery_dl/extractor/imagebam.py
index aeceec6c..14e42f05 100644
--- a/gallery_dl/extractor/imagebam.py
+++ b/gallery_dl/extractor/imagebam.py
@@ -30,12 +30,10 @@ class ImagebamExtractor(Extractor):
         url, pos = text.extract(page, '<img src="https://images', '"')
         filename = text.unescape(text.extract(page, 'alt="', '"', pos)[0])
 
-        data = {
+        return text.nameext_from_name(filename, {
             "url"      : "https://images" + url,
             "image_key": path.rpartition("/")[2],
-        }
-        data["filename"], _, data["extension"] = filename.rpartition(".")
-        return data
+        })
 
 
 class ImagebamGalleryExtractor(ImagebamExtractor):
diff --git a/test/results/imagebam.py b/test/results/imagebam.py
index 759e2dc4..75675ea8 100644
--- a/test/results/imagebam.py
+++ b/test/results/imagebam.py
@@ -75,4 +75,16 @@ __tests__ = (
     "#sha1_content" : "f81008666b17a42d8834c4749b910e1dc10a6e83",
 },
 
+{
+    "#url"     : "https://www.imagebam.com/image/b728aa119132443",
+    "#comment" : "filename without extension (#8476)",
+    "#class"   : imagebam.ImagebamImageExtractor,
+    "#results" : "https://images3.imagebam.com/d2/7a/d9/b728aa119132443.jpg",
+
+    "extension": "",
+    "filename" : "34415_AlessandraAmbrosio_PhotoshootforVictoriasSecretwearingbikinislingerieonthebeachinMalibuCalifor",
+    "image_key": "b728aa119132443",
+    "url"      : "https://images3.imagebam.com/d2/7a/d9/b728aa119132443.jpg",
+},
+
 )