C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 9b2361191fa638af…

MALICIOUS

PDF

331.9 KB Created: 2011-05-26 13:35:49 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 87a79e8d27e99c32d42337338a209e80 SHA-1: 02246340d894ba01ee3c7822ae16175f5e6d16bb SHA-256: 9b2361191fa638af936bd57ccf85e6a723f2d7a4b0eee200383e011aeaf505bd
60 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

The PDF contains a critical heuristic firing for CVE_2008_2551, indicating an exploit for C6 Messenger DownloaderActiveX. This exploit likely facilitates the download of a secondary payload from the embedded URL http://artisanballoonz.com/system/system.exe. The file's purpose is to deliver this malicious executable.

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_001_off000003cb.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3CB 73272 bytes

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