Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dacb6c4b03ca425…

MALICIOUS

PDF

91.5 KB Created: 2020-04-03 15:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: af700d0779cc3d2e473b76fadb8315f3 SHA-1: 9e86a2e416b4d4520d211a0b1ac8c984f824dfcb SHA-256: 8dacb6c4b03ca4251d0818457f02a6c7866476c40d242c4c78e4ea27eac4a398
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains, indicating a link farm for SEO manipulation or traffic redirection. The document body, though heavily obfuscated, contains references to 'Oedipus rex text book' and the authoring application 'wkhtmltopdf', suggesting a deceptive lure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://philsmattresspalace.com/uploads/1/3/0/8/130813364/130813364.html#oedipus+rex+text+book
    • http://theapronboutiqueshop.com/uploads/1/3/0/5/130588687/5653326.pdf
    • http://multifandomshop.ca/uploads/1/3/0/7/130738876/1609146.pdf
    • http://thepokeytruck.com/uploads/1/3/0/8/130813694/xuxonadulexuzimonowi.pdf
    • http://quasality.com/uploads/1/3/1/3/131378897/2dcb84.pdf
    • http://bellafiore-charlotte.com/uploads/1/3/1/3/131380600/930347.pdf
    • http://litsoudis.com/uploads/1/3/0/6/130621376/b4e48ec8f5.pdf
    • http://morrisoncohentherapy.com/uploads/1/3/1/4/131437504/4408966.pdf
    • http://stoneworld.be/uploads/1/3/1/4/131454526/jofonenugazux.pdf
    • http://shopsweven.com/uploads/1/3/0/6/130620729/fewopo.pdf
    • http://businessethicspro.com/uploads/1/3/0/3/130323559/xofasonikuzu.pdf
    • http://westcoastwebleads.com/uploads/1/3/0/5/130589227/pikawilixezojulo.pdf
    • http://myelectricalservices.com/uploads/1/3/1/3/131384127/bovon.pdf
    • http://crossfit3086.com/uploads/1/3/0/6/130621980/gidif.pdf
    • http://heckmanassociates.net/uploads/1/3/1/3/131398288/fojuxiduturiwod.pdf
    • http://mykpilgrim.com/uploads/1/3/0/9/130969678/5215683.pdf

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