Malicious PDF — malware analysis report

Static analysis result for SHA-256 504412c76775b7f1…

MALICIOUS

PDF

24.8 KB Created: 2020-04-24 05:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: acf8d8b1dd241d91e102be5ccc250951 SHA-1: f61bce2db0b6e02aa1a69fb29ed6b367ede11987 SHA-256: 504412c76775b7f1f852ee389c58e741e3024110155531e3ff0ff1ec8ca1968d
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files with numeric or generic slugs, indicative of a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains references to a 'Honda insight 2012 manual' and 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://tdachospitality.com/uploads/1/3/1/3/131379868/131379868.html#honda+insight+2012+manual
    • http://durrana.com/uploads/1/3/0/2/130289618/6001676.pdf
    • http://savannahsudzy.com/uploads/1/3/1/4/131406932/c7c4d559c4.pdf
    • http://thegrilllab.com/uploads/1/3/0/3/130313180/kefezilomefiwogot.pdf
    • http://americatur.net/uploads/1/3/0/6/130621470/tuduzer-nupunelizizim-vifaromuwisubol.pdf
    • http://eccentricsoundz.com/uploads/1/3/1/3/131383515/zaguguluwuzanixu.pdf
    • http://stacksapparelshop.com/uploads/1/3/0/8/130874670/pewuj-penezu.pdf
    • http://reimageprinting.com/uploads/1/3/1/4/131452967/7532320.pdf
    • http://gainesville-estate-law.com/uploads/1/3/0/6/130604407/monabininup-lipono-xepokijiposax-vudikuxe.pdf
    • http://garydannenbaum.com/uploads/1/3/0/7/130775446/mafadosuli_mejawinopixij_vejebonenip.pdf

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