C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 ee0b6eebd7fb24bf…

MALICIOUS

PDF

53.6 KB Created: 2011-04-13 10:04:44 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 1b9db579c5bbb334ce1cfbc00c182e1f SHA-1: e7fbdaa25f24bd8de473eea92ec57e4747a40926 SHA-256: ee0b6eebd7fb24bf569ecd81a4445826226d17812adbb4ac17b3cb792f7be608
62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 85%

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

The sample is a PDF file that contains a critical heuristic firing for the CVE_2008_2551 exploit, which is known to download and execute payloads. An embedded URL points to a suspicious executable file, 'system.exe', on the domain 'artisanballoonz.com'. This indicates the file's purpose is to exploit a vulnerability to deliver a 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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