C6 Messenger DownloaderActiveX — PDF malware analysis

Static analysis result for SHA-256 fbfc412edbd8e621…

MALICIOUS

PDF

228.1 KB Created: 2011-07-07 23:33:26 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 2a1c30a4e389cc23383b57223e827a36 SHA-1: 470536de42b9e340f418c06ed7b80229dc2c7e00 SHA-256: fbfc412edbd8e621dc27ace3ce9cd56c292f465b73e1cc8151318b9b44b6ef7d
62 Risk Score

Malware Insights

C6 Messenger DownloaderActiveX · confidence 90%

MITRE ATT&CK
T1204.002 Malicious File

The sample is a PDF document that contains a heuristic firing for the CVE-2008-2551 exploit, targeting the DownloaderActiveX component. This exploit is designed to download and execute a payload from a specified URL. The embedded URL http://artisanballoonz.com/system/system.exe is highly suspicious and likely serves as the download location for the malicious payload. The other embedded URL, http://c6.community.alice.it/download/DownloaderActiveX.cab#Version=1,0,0,1, appears to be related to the exploit 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_001_off000003be.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3BE 73272 bytes

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