Malicious PDF — malware analysis report

Static analysis result for SHA-256 9adff4912fb743ca…

MALICIOUS

PDF

24.6 KB Created: 2020-04-14 09:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1672824db7d34615f12186f94985a8b8 SHA-1: 75c5bcd3567f2d5d74001d0ecc019eef2cacc844 SHA-256: 9adff4912fb743caaf0abecd1e4aa16230704a63ee4aa5e4c72fb8185e773523
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files, a technique commonly used for SEO poisoning to drive traffic to malicious sites. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a guitar tablature PDF. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of a link farm designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://launits.com/uploads/1/3/0/6/130640039/130640039.html#canon+in+d+solo+guitar+pdf
    • http://bourne4seasons.com/uploads/1/3/1/4/131407155/5481191.pdf
    • http://homegrownwebdesign.com/uploads/1/3/1/1/131164456/434364.pdf
    • http://ahahomestay.com/uploads/1/3/0/5/130588203/4634469.pdf
    • http://davidbuzaglo.com/uploads/1/3/1/1/131163514/3cd1e8d00d08.pdf
    • http://accomplishdreams.net/uploads/1/3/0/6/130605248/6955706.pdf
    • http://coprova.org/uploads/1/3/0/4/130435641/wuwop.pdf
    • http://taamaintenancesolutionsllc.com/uploads/1/3/0/8/130874237/bunariboxula-dotisatironuni-pegitedojuta.pdf
    • http://oahubodyworks.com/uploads/1/3/0/4/130488509/neromumafanumu-xarikozafaje.pdf
    • http://baksonconsulting.com/uploads/1/3/0/3/130324044/lotomufuno-pasajobif.pdf
    • http://bluejaywritings.com/uploads/1/3/0/9/130969154/vinadamunog.pdf
    • http://squaredisplay.net/uploads/1/3/0/9/130969452/140793.pdf
    • http://wellnessits.com/uploads/1/3/0/9/130969505/zamuvuwe.pdf
    • http://airporti10businesspark.com/uploads/1/3/0/2/130288861/1d180e0d6f7249e.pdf

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