The types of attachments we see in malware email

Out of the 5622 attachments with filenames, the most common file extensions were:

More than half of these attachments were in messages detected as phish (more or less 55%, as it turns out). zip file attachments), there is no particularly dominating set of contents. My overall conclusion from this is that we don’t really have any additional smoking gun file attachment types that we could argue for automatically rejecting on sight.

Source: utcc.utoronto.ca