C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 2fd9aae0c2b1f457…

MALICIOUS

PDF

56.4 KB Created: 2011-05-17 22:51:58 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: d9c7ad93d6a862200b1ddc1d50aa1854 SHA-1: eadbc3a4cc81f753790a85216bcad7d6b329d2bf SHA-256: 2fd9aae0c2b1f457ad1fdc84144048ebb8254b48412d26ce9c075a3131b399ad
60 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK
T1204.001 Malicious Link/Object: User Execution: Malicious Link

The critical heuristic firing for CVE_2008_2551 indicates the file is designed to exploit this vulnerability. The embedded URL http://artisanballoonz.com/system/system.exe is likely the download location for a malicious payload. The other embedded URL, http://c6.community.alice.it/download/DownloaderActiveX.cab#Version=1,0,0,1, is associated with the downloader itself.

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_off00000a3a.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA3A 73272 bytes

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