C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 e15ede8d0549d1c7…

MALICIOUS

PDF

607.3 KB Created: 2011-05-17 09:18:33 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: e1a2816610a6d2a60e9c20b63c8d3027 SHA-1: 905d76e4ceddf6b6c28f17f6f16c2b1333f3f28d SHA-256: e15ede8d0549d1c786cbacf222d31168686049b908ca3717007a3b45d7afd143
62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 95%

The PDF file contains a critical heuristic firing for the CVE_2008_2551 exploit, which is known to be used by the C6 Messenger Downloader. The embedded URL 'http://artisanballoonz.com/system/system.exe' likely serves as the secondary payload. The exploit targets a vulnerability in Adobe Reader to facilitate the download and execution of this payload.

Heuristics 2

  • C6 Messenger DownloaderActiveX exploit critical CVE exact CVE_2008_2551
    PDF stream bytes contain HTML/ActiveX content configuring the vulnerable C6 Messenger DownloaderActiveX control with propDownloadUrl and propPostDownloadAction=run. This is the published exploit shape for CVE-2008-2551.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://artisanballoonz.com/system/system.exe
    • http://c6.community.alice.it/download/DownloaderActiveX.cab#Version=1,0,0,1

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00000688.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x688 73272 bytes

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