Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbf2bf68af48258…

MALICIOUS

PDF

39.6 KB Created: 2020-04-11 23:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9f2557561963b5f8ef7301840ead9cfa SHA-1: b6ab9980fe62e89b6038d7de25b98a34abd39cde SHA-256: cdbf2bf68af48258b1c5699dd1703854c825c4c04e74f74e21152216b2bb0a9f
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which follow a pattern indicative of an SEO link farm. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically. The primary function appears to be redirecting users to a network of potentially malicious sites hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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://kbijoux.com/uploads/1/3/0/3/130379461/130379461.html#oraciones+con+el+tiempo+preterito+perfecto
    • http://groupbrew.com/uploads/1/3/1/4/131455416/gimoja.pdf
    • http://cypressfinancialcenter.com/uploads/1/3/1/4/131409009/9265893.pdf
    • http://can.cz/uploads/1/3/0/4/130435657/poropidi-saroxeruxesabo-wugorofadawozeg-ragux.pdf
    • http://graceclarkmedia.org/uploads/1/3/0/6/130605259/teletewifop.pdf
    • http://ethiorestaurantandspice.com/uploads/1/3/0/2/130291438/bdeb34dc8950d23.pdf
    • http://bsh-events.com/uploads/1/3/0/7/130775352/b900e0a0.pdf
    • http://janepermcollins.com/uploads/1/3/0/5/130589220/babojex.pdf
    • http://schroegendorfer.at/uploads/1/3/0/2/130274145/lawobebom.pdf
    • http://bronxcbt.com/uploads/1/3/0/6/130639426/4778522.pdf
    • http://bobbysmobilebar.com/uploads/1/3/0/2/130288378/xisavekukakijunubola.pdf
    • http://sgfuniqueboutique.com/uploads/1/3/0/6/130620176/4a399fe44f1c3.pdf
    • http://connectthelotscamden.com/uploads/1/3/1/4/131406020/malerotasozovut.pdf
    • http://sgfuniqueboutique.com/uploads/1/3/0/6/130620176/4a399fe

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