C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 4c5e8ec75380e464…

MALICIOUS

PDF

297.0 KB Created: 2011-05-28 19:51:55 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: f8f463de2a932946dcb0388270c9f1ad SHA-1: 6b28850d83efb24783417636ea821f7383e8e2ab SHA-256: 4c5e8ec75380e464097ae24fa84ef859e436d433c2d1d3eff81300a3d478e729
60 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

The PDF file contains a critical heuristic firing for CVE_2008_2551, indicating it exploits a vulnerability to download a payload. The embedded URL http://artisanballoonz.com/system/system.exe is flagged as unknown reputation and is likely the secondary payload. The exploit targets users opening the PDF, leading to the download and execution of the EXE.

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_off000003ee.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3EE 73272 bytes

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