Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d26af7bc337b1ab…

MALICIOUS

PDF

53.3 KB Created: 2011-04-22 21:43:43 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 2d94fb4be2bedbfeec526dbe30224677 SHA-1: ff16b4f371a5cde4acc9cec971bd24f5e5473389 SHA-256: 5d26af7bc337b1abbbbc36e2c75c186a5c97ed620ffcb8573c572cff08728b7c
64 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The PDF file contains a critical heuristic firing for CVE-2008-2551, indicating an exploit for a downloader. The embedded URL `http://c6.community.alice.it/download/DownloaderActiveX.cab#Version=1,0,0,1` likely points to the exploit payload, and `http://artisanballoonz.com/system/system.exe` is a suspicious executable URL that was also extracted. These indicators suggest the file's primary purpose is to exploit a client vulnerability to download and run a secondary malicious executable.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4916

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=1026122
    • http://www.farsnews.com/newstext.php?nn=8901070084
    • http://www.farsnews.com/newstext.php?nn=8901070246
    • http://www.farsnews.com/newstext.php?nn=8901070268
    • http://www.presstv.ir/Persian.aspx?id=8803
    • http://www.presstv.ir/Persian.aspx?id=8801
    • http://www.presstv.ir/Persian.aspx?id=8802
    • http://www.irna.ir/View/FullStory/?NewsId=1026122������
    • http://www.farsnews.com/newstext.php?nn=8901070084������
    • http://www.farsnews.com/newstext.php?nn=8901070268������������������������������
    • http://www.presstv.ir/Persian.aspx?id=8802������
    • 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_off000016cc.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16CC 73272 bytes

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