Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed445835c88708b6…

MALICIOUS

PDF

53.6 KB Created: 2011-05-17 08:49:33 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 5408577c4b448d15778e0fd097a68755 SHA-1: bc4f86c90b4929cb31107df85a86d03560b51821 SHA-256: ed445835c88708b69ae8796fdfe143e70ff6b82a8bbe1c3a4dadfd87203ed64d
62 Risk Score

Malware Insights

The sample is a PDF document that contains a critical heuristic firing for the CVE_2008_2551 exploit, which is known to download and execute payloads. The document also contains an embedded URL pointing to a CAB file, which likely contains the exploit or payload. An additional unknown URL was also extracted, which is highly suspicious. The primary attack vector appears to be exploiting a vulnerability in the PDF reader to download and run a secondary executable.

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.presstv.ir/Persian.aspx?id=10358
    • http://www.irna.ir/View/FullStory/?NewsId=1151206
    • http://www.presstv.ir/Persian.aspx?id=10353
    • http://www.irna.ir/View/FullStory/?NewsId=1149715
    • http://www.iribnews.ir/Default.aspx?Page=MainContent&news_num=228558
    • http://www.iribnews.ir/Default.aspx?Page=MainContent&news_num=228516
    • http://www.iribnews.ir/Default.aspx?Page=MainContent&news_num=228526
    • 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_off000017d8.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17D8 73272 bytes

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