Malicious PDF — malware analysis report

Static analysis result for SHA-256 168f39160007661a…

MALICIOUS

PDF

13.8 KB Created: 2019-05-05 14:25:00 +01:00 Authoring application: mPDF 5.7
MD5: 28302f5e9655fe646b438d0fa594e0fb SHA-1: d8d41b40d6c597208cf881be8a4dea9bb566793b SHA-256: 168f39160007661a6a0699bc8554050223a0b16e236398ee630b52e1189fddef
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links to external PDF files hosted on the domain 'cefasfese.4pu.com'. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious, supporting the suspicious nature of the embedded links. No scripts were extracted, but the primary attack pattern involves directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

Heuristics 2

  • 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.
  • 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://cefasfese.4pu.com/1732736735734738/Split-Second-FBI-Thriller-15-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/1733730739/Nemesis-FBI-Thriller-19-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/1735737737734735/Bombshell-FBI-Thriller-17-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/1735738733734736/Backfire-FBI-Thriller-16-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/2732737736734733/Knock-Out-FBI-Thriller-13-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/3733737731736730/Enigma-FBI-Thriller-21-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/6733737735732738/Blind-Side-FBI-Thriller-8-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/2733737739738731/Afterglow-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/9732734739/The-Sixth-Day-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/2739736732737737/Beyond-Eden-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/4730730734738739/The-Heir-Regency-3-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/7739730733/The-Sixth-Day-A-Brit-in-the-FBI-5-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/4730730734739730/The-Offer-Baron-2-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/1732730735737735/Mad-Jack-Brides-4-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/2732736735732731/The-Duke-Regency-4-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/3737734736731733/An-Honorable-Offer-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/2732735738739737/The-Penwyth-Curse-Medieval-Song-6-by-Catherine-Coulter.pdf
    • http://cefasfese.4pu.com/4731731731733/My-Sunshine-Kendrick-Coulter-Harrigan-6-by-Catherine-Anderson.pdf
    • http://cefasfese.4pu.com/8735739738738/Sweet-Nothings-Kendrick-Coulter-Harrigan-3-by-Catherine-Anderson.pdf
    • http://cefasfese.4pu.com/3738733731731735/Baby-Love-Kendrick-Coulter-Harrigan-1-by-Catherine-Anderson.pdf

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