Malicious PDF — malware analysis report

Static analysis result for SHA-256 31ea9e2bdd0033d3…

MALICIOUS

PDF

53.4 KB Created: 2011-04-22 21:31:28 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 7d536bbd687e5671cee22a1c131717ba SHA-1: 7e85d5fe44ac375b9306ffd0c3db0621465f7d0e SHA-256: 31ea9e2bdd0033d338d52f518c88717238561237219d2200694d74065e259827
62 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1204.001 User Execution: Malicious Link

The sample is a PDF document that contains an embedded exploit for CVE-2008-2551, known as the C6 Messenger DownloaderActiveX exploit. This exploit is designed to download and execute a secondary payload from a remote location. The heuristic analysis identified the exploit and an embedded URL pointing to a potential executable file. The document body contains multiple benign URLs, likely for obfuscation, but the primary malicious indicator is the exploit itself.

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=893788
    • http://www.irna.ir/View/FullStory/?NewsId=893869
    • http://www.mehrnews.com/fa/newsdetail.aspx?NewsID=1016245
    • http://www.presstv.com/Persian.aspx?id=7105
    • http://www.irna.ir/View/FullStory/?NewsId=893915
    • 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_off00001717.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1717 73272 bytes

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