Malicious PDF — malware analysis report

Static analysis result for SHA-256 74cef32130ab2468…

MALICIOUS

PDF

20.9 KB Created: 2020-04-10 17:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0f04587240fc5258c7c0e7290f40b784 SHA-1: 7808baa3e8cb262c7788d556589391f4912a1948 SHA-256: 74cef32130ab246836be49d7e7d070f5c9d2f7a2eb8c1a30d5e6f8ba897da502
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs and the structure suggest an attempt to manipulate search engine results or distribute malicious content through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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.
  • 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://whistleworldwide.com/uploads/1/3/0/6/130620730/130620730.html#statistics+relative+frequency
    • http://lunaoutlet.com/uploads/1/3/1/4/131437464/3340828.pdf
    • http://mariettahometheater.com/uploads/1/3/0/5/130550847/pijon.pdf
    • http://bulldogsofsandiego.com/uploads/1/3/0/5/130551472/4114411.pdf
    • http://galsinstitute.org/uploads/1/3/0/2/130288341/469601.pdf
    • http://daddybabygirl.org/uploads/1/3/0/7/130739779/158d14.pdf
    • http://allquiltedtogether.com/uploads/1/3/0/6/130621457/44862cc356f1a.pdf
    • http://shiveringstringswest.com/uploads/1/3/0/6/130620472/vagutigagelari.pdf
    • http://csmx.info/uploads/1/3/0/8/130874320/tudoxomenimopegame.pdf
    • http://furrysmithlaw.com/uploads/1/3/0/6/130603959/3276698.pdf
    • http://nduboisphotography.com/uploads/1/3/0/7/130739200/51051.pdf
    • http://my420tins.com/uploads/1/3/0/2/130273578/4113212.pdf
    • http://carolynmayhew.com/uploads/1/3/0/3/130379514/butixu.pdf
    • http://makingcentsofitall.com/uploads/1/3/0/7/130739723/f434b5c67.pdf
    • http://brooksequipmentco.info/uploads/1/3/0/5/130550743/pivijonejag.pdf

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