Malicious PDF — malware analysis report

Static analysis result for SHA-256 656543ee740f6bf0…

MALICIOUS

PDF

58.0 KB Created: 2011-05-17 09:05:32 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 49e4b4aa2d38f877d7e82699794093c5 SHA-1: 3f33e7074ffeb941afa584f6b38f442bb5410e11 SHA-256: 656543ee740f6bf04d89f715a60ef25f8cea9df480c1fff18cbcecf8cd188f25
64 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a PDF file that contains an exploit for CVE-2008-2551, a known vulnerability in PDF readers. This exploit is designed to download and execute a second-stage payload. The embedded URLs, while mostly benign, indicate the document's intent to redirect the user to external content, which is a common lure for malicious documents.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2549

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://www.mehrnews.ir/NewsPrint.aspx?NewsID=1060633
    • http://artisanballoonz.com/system/system.exe
    • http://www.irna.ir/View/FullStory/?NewsId=1044676
    • http://www.irna.ir/View/FullStory/?NewsId=1044583
    • http://www.irna.ir/View/FullStory/?NewsId=1044772
    • http://www.farsnews.com/newstext.php?nn=8901200507
    • http://www.irna.ir/View/FullStory/?NewsId=1043727
    • http://www.farsnews.com/newstext.php?nn=8901200651
    • http://www.presstv.ir/Persian.aspx?id=9047
    • http://www.presstv.ir/Persian.aspx?id=9046
    • http://www.irna.ir/View/FullStory/?NewsId=1044676������
    • http://www.irna.ir/View/FullStory/?NewsId=1044583������
    • http://www.farsnews.com/newstext.php?nn=8901200507������
    • http://www.irna.ir/View/FullStory/?NewsId=1043727������
    • http://www.farsnews.com/newstext.php?nn=8901200651������
    • http://www.presstv.ir/Persian.aspx?id=9047������
    • http://www.presstv.ir/Persian.aspx?id=9046������
    • 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_007_off000028ac.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x28AC 73272 bytes

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