C6 Messenger Downloader PDF malware analysis — malicious · ebcb9d8f575e6ce2

MALICIOUS

PDF

932.5 KB Created: 2011-06-22 16:31:24 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 99b76ba6ea3046679b0666bcec676d40 SHA-1: 92dae096a5e6e86bb90788c4a3c80276a8e47e6d SHA-256: ebcb9d8f575e6ce2fb8c9f725d5e2ef335953ef510c36558348f155ba8442691

60 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK

T1204.002 Malicious File

The critical heuristic firing for CVE_2008_2551 indicates the document is designed to exploit this vulnerability. The embedded URL points to a potential second-stage payload, 'system.exe', which is highly suspicious. The document body was unreadable, but the exploit and download URL strongly suggest a downloader attack pattern.

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.

Filename	Kind	Source	Size
`stream_002_off000006ba.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6BA	73272 bytes

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