Malicious PDF — malware analysis report

Static analysis result for SHA-256 b365262ac7ceb297…

MALICIOUS

PDF

42.2 KB Created: 2020-03-22 14:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c29acdee8016e5ee82f01cf77430088f SHA-1: 97d94d55a09df3f38b84f2d62a08c75c30409c47 SHA-256: b365262ac7ceb2975674e95cbebce49985443ab0226fab1624d5592264d25d4e
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO manipulation tactic, which can be used to distribute malicious content or improve search engine rankings for malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://henrymohrpta.org/uploads/1/3/0/7/130739492/130739492.html#oracion+de+liberacion+catolica
    • http://www.chaosandcuteness.com/uploads/1/3/0/6/130640004/1773384.pdf
    • http://autodiscover.jeffestill.com/uploads/1/3/0/7/130739906/993504.pdf
    • http://otherworldlywaxesandwhatever.com/uploads/1/3/0/7/130739037/dofagijezomeb-renazanuka-fadarov.pdf
    • http://www.funnel-republic.com/uploads/1/3/0/8/130874232/7899949.pdf
    • http://www.vancouvergaragerepair.com/uploads/1/3/0/7/130776754/2225665.pdf
    • http://armor-vci.com/uploads/1/3/0/7/130776827/4844393.pdf
    • http://songsnskills.com/uploads/1/3/0/5/130550760/ruxojasabifojob-kopabozuligun-towojaxeda-vozone.pdf
    • http://babiroo.com/uploads/1/3/0/2/130289692/8e8e807.pdf
    • http://yokel411.com/uploads/1/3/0/6/130621814/0d6683d32d.pdf
    • http://readcoolbeans.com/uploads/1/3/0/6/130604406/4af828c8227a5.pdf
    • http://www.lovewellnessspa.com/uploads/1/3/0/4/130475973/2160547.pdf
    • http://themarkstaging.com/uploads/1/3/0/7/130738700/9676345.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a27.bin
23ced74a772e1f93c3cb3b339ecd4631a4116084d7fd06f4d7632f42a5f67bd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A27 8944 bytes

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