C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 983764bcd7ad174a…

MALICIOUS

PDF

56.7 KB Created: 2011-04-22 21:57:10 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 0507e74e7c4c80d792c6941b35c8a0af SHA-1: 4246325a349b125d60d25ade961a53f3261feef1 SHA-256: 983764bcd7ad174a6f8f1d84830e215f844e3e369e3744f19678e3f0116107c3
62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 95%

MITRE ATT&CK
T1204.002 Malicious File T1204.001 Malicious Link

The PDF file contains a critical heuristic firing for the CVE_2008_2551 exploit, which is associated with the C6 Messenger Downloader. This exploit is designed to download and execute a second-stage payload from a remote URL. While the document body and extracted URLs contain links to news articles, the primary malicious indicator is the exploit itself, suggesting a downloader functionality.

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=1225289
    • http://www.farsnews.com/newstext.php?nn=8904230102
    • http://www.presstv.ir/detail.fa.aspx?id=134657&sectionid=351021501
    • http://www.farsnews.com/newstext.php?nn=8904230001
    • http://www.farsnews.com/newstext.php?nn=8904230024
    • http://www.presstv.ir/detail.fa.aspx?id=134617&sectionid=351021504
    • http://www.presstv.ir/detail.fa.aspx?id=134625&sectionid=351021509
    • http://www.presstv.ir/detail.fa.aspx?id=134663&sectionid=351021507
    • http://www.presstv.ir/detail.fa.aspx?id=134626&sectionid=351021507
    • http://www.presstv.ir/detail.fa.aspx?id=134605&sectionid=351021506
    • http://www.presstv.ir/detail.fa.aspx?id=134667&sectionid=351021507
    • http://www.presstv.ir/detail.fa.aspx?id=134612&sectionid=351021503
    • http://www.presstv.ir/detail.fa.aspx?id=134582&sectionid=351021507
    • http://www.farsnews.com/newstext.php?nn=8904220149
    • 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_off000023f5.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x23F5 73272 bytes

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