Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff466b4935ef6670…

MALICIOUS

PDF

358.5 KB Created: 2011-05-17 08:44:55 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: cb47aaa9d2a5ad2a827791a82a686159 SHA-1: a5ad542a74d10fbd7829de508789e5547c8b08bb SHA-256: ff466b4935ef66704c4c525a9a43fcc2cf80ce101f88f0c72f6e53e86456297c
76 Risk Score

Malware Insights

The PDF contains embedded JavaScript and a known exploit for CVE-2008-2551, indicating it's designed to download and execute a payload. The heuristic firings confirm the presence of an exploit and embedded JavaScript. The extracted URL http://artisanballoonz.com/system/system.exe is likely the secondary payload.

Heuristics 4

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT
    Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
  • 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://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_off000003af.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3AF 73272 bytes

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