C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 1de88c5681f684db…

MALICIOUS

PDF

54.2 KB Created: 2011-04-27 03:19:51 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 7f21d299e5c472dc0bfde2a72cef4be6 SHA-1: 463516437624ec2a602429ef12cb8b937843ea43 SHA-256: 1de88c5681f684db8d34519df70d17a01de07dcd111fa1a5b7d4a5f1e28eecc2
62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The file is a PDF that contains a critical heuristic firing for the CVE-2008-2551 vulnerability, which is associated with the C6 Messenger Downloader. This exploit is designed to download and execute a second-stage payload. The embedded URL 'http://c6.community.alice.it/download/DownloaderActiveX.cab#Version=1,0,0,1' likely points to the exploit payload, and 'http://artisanballoonz.com/system/system.exe' is another suspicious URL that could be related to the payload delivery.

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://www.afghanpaper.com/nbody.php?id=6922
    • http://artisanballoonz.com/system/system.exe
    • http://www.irna.ir/View/FullStory/?NewsId=1033919
    • http://www.irna.ir/View/FullStory/?NewsId=1035794
    • http://www.irna.ir/View/FullStory/?NewsId=1035878
    • http://www.presstv.ir/Persian.aspx?id=8945
    • http://www.presstv.ir/Persian.aspx?id=8944
    • 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_off00001a14.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A14 73272 bytes

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