I’m providing a 2-day training at Brucon Spring Training 2016: “Analysing Malicious Documents“.
Malicious MS Office documents are also distributed as MIME files. A blog reader asked for help with a MIME file that gave him problems: f67aa5a3ede3d31c5a68494c0678e2ee.
Accoring to emldump.py, the file is just text (not a multipart file):
But if you look at the file, you’ll notice a line preceding the MIME-Version line:
You can instruct emldump to skip this line with option -H:
Now emldump is able to analyze the multipart MIME file, and detect the MSO file (part 3). oledump can analyze MSO files:
Didier Stevens 
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