Last Updated: 2018-01-20 22:36:00 UTC
by Didier Stevens (Version: 1)
I received another RTF file (with .doc extension) via email. Let's take a look with rtfdump:
It looks like there are no embedded objects, let's make sure by filtering:
There are no embedded objects, or they are so heavily obfuscated that rtfdump doesn't find them. To exclude this hypothesis, we look for hexadecimal digits:
Some of the sequences (like 17 and 18) contain 1329 hexadecimal characters, but only strings of 5 or 6 contiguous hexadecimal characters.
Either this is extremely obfuscated, or it doesn't contain exploits, but is rather phising.
Searching for URLs:
Indeed, it is phishing (NetEase / 163 is a Chinese Internet company):