Malicious PDF — malware analysis report

Static analysis result for SHA-256 f009548daf742883…

MALICIOUS

PDF

37.8 KB Authoring application: PDFBox
MD5: 2b6c1736997ee4b60280cdbe767f2776 SHA-1: 5d2fbdd43f5c3e2d273558e6f8aab383335b87ec SHA-256: f009548daf7428830053b9ef250736327ec22d21b2e3db8667eb7d7cb1636a12
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body mentions 'On submit form jquery not working', which appears to be a lure to engage the user, and the embedded URLs are likely part of a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://psupostdoc.org/uploads/1/3/0/6/130621072/poropemanimakasas.pdf
    • http://shifnalbc.co.uk/uploads/1/3/0/2/130287898/97296.pdf
    • http://mikemythphotography.com/uploads/1/3/0/5/130588417/melunoge.pdf
    • http://itero3dlab.com/uploads/1/3/0/6/130605269/bitid.pdf
    • http://truedefinitionlab.com/uploads/1/3/0/5/130590663/sovojabafaviseditut.pdf
    • http://thebiotutor.com/uploads/1/3/0/2/130273581/8548812.pdf
    • http://michaudwellness.com/uploads/1/3/0/6/130621746/130621746.html#on+submit+form+jquery+not+working

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001126.bin
7295a89c3ff40ee6d6ab9416bfbaac53d23d3aee510afa000ed9a7e634c30fd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1126 9220 bytes

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