C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 08517712fdb78004…

MALICIOUS

PDF

327.2 KB Created: 2011-05-26 15:05:15 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 9c74da166daa99d770f25970bc73ff63 SHA-1: 9337bddf1e1c20e5e4b6e5f86fbfb9c8f3b0b832 SHA-256: 08517712fdb78004088289a0e0ade6b66d792870ade4f878ae3c8d1da41eb8f5
92 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK
T1203 Exploitation for Client Execution

The PDF file contains a critical heuristic indicating an exploit for CVE-2008-2551, which is associated with the C6 Messenger Downloader. This exploit likely targets a vulnerability to download and execute a payload from the URL http://artisanballoonz.com/system/system.exe. Another embedded URL, http://c6.community.alice.it/download/DownloaderActiveX.cab, is also present.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8067

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_004_off00001bdc.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1BDC 73272 bytes

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