C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 c610f62c78a5acca…

MALICIOUS

PDF

52.3 KB Created: 2011-05-26 14:47:50 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 5ea7bce128c94051ce54e7f1b914f042 SHA-1: 7eb6f184b0a6a6595e8c50aaa31d95108ae4a25a SHA-256: c610f62c78a5accad65190a6ac29461007f8e1d59d13cfd74ddb7b2530aa380b
62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 95%

MITRE ATT&CK
T1204.002 Malicious File

The sample is a PDF file that contains a critical heuristic firing for the CVE-2008-2551 C6 Messenger DownloaderActiveX exploit. This exploit is designed to download and execute a second-stage payload from a specified URL. The presence of the DownloaderActiveX.cab URL and the executable system.exe on artisanballoonz.com strongly suggests this malicious intent.

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.farsnews.com/newstext.php?nn=8808040127
    • http://www.irna.ir/View/FullStory/?NewsId=752893
    • http://www.irna.ir/View/FullStory/?NewsId=752526
    • http://www.irna.ir/View/FullStory/?NewsId=753365
    • http://www.iribnews.ir/Default.aspx?Page=MainContent&news_num=204011
    • 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_off000012f6.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12F6 73272 bytes

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