Malicious PDF — malware analysis report

Static analysis result for SHA-256 2422ac04ee4b7e4d…

MALICIOUS

PDF

27.0 KB Created: 2020-04-06 06:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bbbb31e284f1d1708348ecffacdded51 SHA-1: 2f564a34e0b2ee3d80ce37f1509c378e550024d9 SHA-256: 2422ac04ee4b7e4d51759f66a5f6b9619aa55b3ed1d1340f137e692bd3f7b528
92 Risk Score

Malware Insights

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

This PDF file contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO link farming or traffic redirection. The ML classifier strongly indicated maliciousness. The document body is heavily obfuscated and contains what appears to be junk data and embedded URLs, further supporting the malicious intent of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://sighmoan.org/uploads/1/3/1/3/131384135/131384135.html#5+ejercicios+de+la+ley+de+ohm+resueltos
    • http://whichstack.com/uploads/1/3/0/3/130323727/2317748.pdf
    • http://bloomsnbouquets.com/uploads/1/3/0/4/130436162/tudogisujo-xajesivewuti.pdf
    • http://eccevideos.net/uploads/1/3/0/7/130775672/2100272.pdf
    • http://clarksclassicflorals.com/uploads/1/3/0/6/130640042/5732755.pdf
    • http://titorawinery.com/uploads/1/3/0/6/130639914/dolapowor_sabiwukonogesa.pdf
    • http://everishpcopenweek.pt/uploads/1/3/0/6/130604091/69251e4b83892ff.pdf
    • http://slsymphonicwinds.org/uploads/1/3/0/5/130538995/nemusag.pdf
    • http://halleeinc.com/uploads/1/3/0/6/130639199/posemizaziko.pdf
    • http://deanerealty.net/uploads/1/3/0/6/130604541/93e6976.pdf
    • http://graphitesquarestudio.com/uploads/1/3/1/0/131071180/nebonumuse.pdf
    • http://judgechrisbruno.com/uploads/1/3/0/7/130776253/dofawuranajabopimiw.pdf

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