Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f968ad024b3f67e…

MALICIOUS

PDF

36.1 KB Authoring application: OpenOffice.org
MD5: c29e3b641a4bf2d3188567c03bc20352 SHA-1: 297083c938f27ca10173c9d9be2328ad27b76b70 SHA-256: 3f968ad024b3f67ee628ee2fd4d7eb96fc111432e537ac077777a524277b5559
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDFs, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Vi editor commands delete line' and includes multiple URLs, suggesting a lure to a site that may host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://cneachome.com/uploads/1/3/0/5/130547576/f5b309306883fc5.pdf
    • http://pjbarkerlaw.com/uploads/1/3/0/5/130551876/xafudosofuzujob.pdf
    • http://matthewgeller.net/uploads/1/3/0/5/130590059/mejip.pdf
    • http://bdplumbingservice.com/uploads/1/3/0/6/130621502/xudowo.pdf
    • http://chewoncakes.com/uploads/1/3/0/4/130489539/130489539.html#vi+editor+commands+delete+line

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001035.bin
61872450dc03a3bdcf7866b5a5cbf66c2e48a6391f3633e6fd40727d5bf477e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1035 8468 bytes

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