C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 e4803473d8277082…

MALICIOUS

PDF

352.3 KB Created: 2011-07-07 23:04:14 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 1f59802b88d448aeb48a8158ad7f25b4 SHA-1: a236a4d5891e964b7818a56d92129a446d7cfd13 SHA-256: e4803473d82770821e28eefa003f64a56d1a8988e51d913620c6b76be23d8506
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. An embedded URL points to a potential second-stage executable, 'system.exe', on 'artisanballoonz.com'. This suggests the PDF is designed to exploit this vulnerability to download and run malware.

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_off00000961.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x961 73272 bytes

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