C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 e7b3320b68514402…

MALICIOUS

PDF

57.4 KB Created: 2011-07-08 00:13:47 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 0776dfab4e5633519ddbe8bec0bd7b61 SHA-1: 93d42d26d4f33005bdfb39f5cf480c89da5f1c56 SHA-256: e7b3320b685144025fbbd6e45d23de39002fe0e6473db1585319639f4cea32bc
62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 95%

MITRE ATT&CK
T1204.002 Malicious File

The sample is a PDF file that exploits the CVE-2008-2551 vulnerability, identified by the 'C6 Messenger DownloaderActiveX exploit' heuristic. This exploit is known to download and execute a second-stage payload. While the embedded URLs are marked as benign, the critical heuristic firing strongly indicates a malicious intent to compromise the user's system via an 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://artisanballoonz.com/system/system.exe
    • http://www.farsnews.com/newstext.php?nn=8903231748
    • http://www.presstv.ir/detail.fa.aspx?id=130281&sectionid=351021501
    • http://www.presstv.ir/detail.fa.aspx?id=130195&sectionid=351021504
    • http://www.presstv.ir/detail.fa.aspx?id=130218&sectionid=351021504
    • http://www.presstv.ir/detail.fa.aspx?id=130215&sectionid=351021504
    • http://www.irna.ir/View/FullStory/?NewsId=1175587
    • http://www.farsnews.com/newstext.php?nn=8903240058
    • http://www.farsnews.com/newstext.php?nn=8903231714
    • http://www.irna.ir/View/FullStory/?NewsId=1175455
    • http://www.farsnews.com/newstext.php?nn=8903221309
    • http://www.irna.ir/View/FullStory/?NewsId=1175575
    • http://www.presstv.ir/detail.fa.aspx?id=130304&sectionid=351021507
    • http://www.presstv.ir/detail.fa.aspx?id=130255&sectionid=351021507
    • 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_005_off000026d0.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x26D0 73272 bytes

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