C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 fd06e063ce5ea59d…

MALICIOUS

PDF

53.6 KB Created: 2011-04-16 14:20:33 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 98a6e4a11ba400cd1b2c1fbb918f1254 SHA-1: 7800607c78769ede5fb5ae51320e2a12e8d3d570 SHA-256: fd06e063ce5ea59d6dbc660773592e84fcce25c2b939ef114b081ce3af1aa6ad
62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 85%

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

The critical heuristic firing for CVE_2008_2551 indicates the file exploits a known vulnerability to download a payload. The embedded URL http://c6.community.alice.it/download/DownloaderActiveX.cab#Version=1,0,0,1, along with the heuristic, strongly suggests the C6 Messenger Downloader family. The file also contains an unknown reputation URL http://artisanballoonz.com/system/system.exe, which is likely the download location for the secondary payload.

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://artisanballoonz.com/system/system.exe
    • http://www.irna.ir/View/FullStory/?NewsId=843295
    • http://www.farsnews.com/newstext.php?nn=8809231839
    • http://www.irna.ir/View/FullStory/?NewsId=842976
    • http://www.irna.ir/View/FullStory/?NewsId=840723
    • http://www.irna.ir/View/FullStory/?NewsId=843385
    • http://www.irna.ir/View/FullStory/?NewsId=842924
    • 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_002_off00001828.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1828 73272 bytes

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