From: eFax [email@example.com]I bet you've already guessed that the link in the message goes somewhere bad, in this case it downloads a ZIP files from cybercity-game.com/game/Documents.zip which unzips to a malicious executable Documents.scr which has a pretty low VirusTotal detection rate of 2/55.
Date: 11 September 2014 20:35
Subject: eFax message from "unknown" - 1 page(s), Caller-ID: 1-865-537-8935
Fax Message [Caller-ID: 1-865-537-8935
You have received a 1 page fax at Fri, 12 Sep 2014 02:35:44 +0700.
* The reference number for this fax is atl_did1-1400166434-52051792384-154.
Click here to view this fax using your PDF reader.
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The ThreatTrack report clearly identifies this as Cryptowall and identifies that it either downloads data from or posts data to the following locations:
The 111.exe has a much wider detection rate of 22/53 and according the the ThreatTrack analysis of that binary there is some sort of network connection to the following IPs:
Overall, the web hosts involved are:
126.96.36.199 (Swift Trace Ltd, Crimea)
188.8.131.52 (GoDaddy, US)
184.108.40.206 (Daiger Sydes Gustafson LLC / Peer 1, US)
220.127.116.11 (OVH, France)
18.104.22.168 (PE Intechservice-B, Ukraine)
22.214.171.124 (Ivanov Vitaliy Sergeevich, Ukraine)
I would recommend blocking the following: