Malicious PDF — malware analysis report

Static analysis result for SHA-256 321cd43031ddc0f4…

MALICIOUS

PDF

52.2 KB Created: 2011-04-27 03:20:28 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: b65e912d21246a0841b54e32bfd9e177 SHA-1: fa6f39b7f8510085bc57d99018d0ecb1a61a629c SHA-256: 321cd43031ddc0f4f87031b8368fe035e0ffc21c819a407d51a2297a7d69fc8b
62 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The PDF contains a critical heuristic firing for the CVE_2008_2551 exploit, indicating it's designed to download and execute a payload. The embedded URL points to a CAB file which likely contains the exploit and a secondary executable. The presence of an unknown reputation URL for 'system.exe' further supports the malicious intent.

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=889420
    • http://www.irna.ir/View/FullStory/?NewsId=889345
    • http://www.mehrnews.com/fa/newsdetail.aspx?NewsID=1014879
    • http://www.mehrnews.com/fa/newsdetail.aspx?NewsID=1015017
    • 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_001_off000012ad.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12AD 73272 bytes

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