Malicious PDF — malware analysis report

Static analysis result for SHA-256 846be7c3e5e2c0c8…

MALICIOUS

PDF

52.2 KB Created: 2011-04-13 09:48:59 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 7af5aae6722503cf3c6824494e05fe58 SHA-1: 5e51ff461c7a6b0132c8de16d38870b536a15f9b SHA-256: 846be7c3e5e2c0c81768b7dbf1c74530cdcf2f67b24d173c9bd0efdc60e1a9bd
62 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1204 User Execution T1059.001 PowerShell

The sample is a PDF file that contains a critical heuristic firing for the C6 Messenger DownloaderActiveX exploit (CVE_2008_2551). This exploit is designed to download and execute a secondary payload. The presence of an embedded URL pointing to 'http://artisanballoonz.com/system/system.exe' strongly suggests the file's purpose is to act as a downloader for further malicious activity. The exploit targets user interaction to trigger the download and execution.

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_off000012d5.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12D5 73272 bytes

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