C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 a88266471c7de3a4…

MALICIOUS

PDF

56.3 KB Created: 2011-06-22 16:54:08 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 234dcb4375b2d7225370f6c256280b8a SHA-1: ab925d267bbe4251b8e53888a6cb91c3d8a98239 SHA-256: a88266471c7de3a4a2aa3d46e37f3a02dfa19aa13a7f19ee528f6c2eb0096c09
64 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 95%

MITRE ATT&CK
T1204.002 Malicious File

The sample is a PDF document that contains a critical heuristic firing for the CVE-2008-2551 C6 Messenger DownloaderActiveX exploit. This indicates the document is designed to leverage this vulnerability to download and execute a secondary payload. The embedded URL, while benign according to reputation data, is associated with the exploit.

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.farsnews.net/newstext.php?nn=8808051075
    • http://www.ghatreh.com/news/4133074.html
    • http://artisanballoonz.com/system/system.exe
    • http://www.alalam.ir/Persian/detail.aspx?id=84914
    • http://www.mehrnews.com/fa/newsdetail.aspx?NewsID=972071
    • http://www.mehrnews.com/fa/newsdetail.aspx?NewsID=972011
    • http://www.mehrnews.com/fa/newsdetail.aspx?NewsID=971641
    • http://www.mehrnews.com/fa/newsdetail.aspx?NewsID=972249
    • http://www.irna.ir/View/FullStory/?NewsId=754403
    • http://www.irna.ir/View/FullStory/?NewsId=757878
    • http://www.irna.ir/View/FullStory/?NewsId=757559
    • http://www.irna.ir/View/FullStory/?NewsId=757247
    • http://www.mehrnews.com/fa/newsdetail.aspx?NewsID=972162
    • http://www.mehrnews.com/fa/newsdetail.aspx?NewsID=971666
    • http://www.irna.ir/View/FullStory/?NewsId=755588
    • 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_off000022f0.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x22F0 73272 bytes

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