Malicious PDF — malware analysis report

Static analysis result for SHA-256 81004bcb88df0961…

MALICIOUS

PDF

14.8 KB Created: 2020-01-02 06:02:54 +00:00 Authoring application: mPDF 5.7
MD5: 4c105ec9405c6c37c7ec3f4db0ea72bf SHA-1: 961e6951b053dbf9365ac3150a52631e3213bbc5 SHA-256: 81004bcb88df09616b6c41449ceb1c70c22a389bbe71ec136375f463c1c98c58
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to external PDF files with numeric slugs in their paths. This behavior is indicative of a link farm or SEO manipulation tactic. While the ML classifier flagged it as malicious, the specific intent beyond link distribution is unclear due to the lack of executable scripts or clear malicious document body 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/8731730738735739/Violence-of-Mind-Training-and-Preparation-for-Extreme-Violence-by-Varg-Freeborn.pdf
    • http://cefasfese.4pu.com/1730734735734734733/Running-with-the-Mind-of-Meditation-Lessons-for-Training-Body-and-Mind-by-Sakyong-Mipham.pdf
    • http://cefasfese.4pu.com/4735730734733/Sex-amp-Violence-by-Carrie-Mesrobian.pdf
    • http://cefasfese.4pu.com/7730735738732733/Violence-by-Richard-Bausch.pdf
    • http://cefasfese.4pu.com/1730730732736736/Violence-Begets-by-P-T-Denys.pdf
    • http://cefasfese.4pu.com/1739732737732730/Violence-Begets-by-P-T-Denys.pdf
    • http://cefasfese.4pu.com/5732736736737/A-Simple-Act-Of-Violence-by-R-J-Ellory.pdf
    • http://cefasfese.4pu.com/7730735736738737/The-Muse-of-Violence-by-Bruce-Hartman.pdf
    • http://cefasfese.4pu.com/7730735736738738/Cycle-of-Violence-by-Colin-Bateman.pdf
    • http://cefasfese.4pu.com/2735734730738734/A-Rush-to-Violence-by-Christopher-Smith.pdf
    • http://cefasfese.4pu.com/4737732730735735/Ultra-Violence-by-Mark-Barry.pdf
    • http://cefasfese.4pu.com/5731731735732737/Ohio-Violence-by-Alison-Stine.pdf
    • http://cefasfese.4pu.com/7730735737737731/The-Question-Vol-1-Zen-and-Violence-by-Dennis-O-39-Neil.pdf
    • http://cefasfese.4pu.com/7730735737737732/Preventing-Violence-by-James-Gilligan.pdf
    • http://cefasfese.4pu.com/9738736736736736/Spate-of-Violence-by-Peggie-Biessmann.pdf
    • http://cefasfese.4pu.com/1734731730737730/Bound-to-Violence-by-Yambo-Ouologuem.pdf
    • http://cefasfese.4pu.com/5732731739737731/The-Violence-of-Austerity-by-Vickie-Cooper.pdf
    • http://cefasfese.4pu.com/7739736737731730/Camus-et-sa-critique-libertaire-de-la-violence-by-Lou-Marin.pdf
    • http://cefasfese.4pu.com/6739732733731732/VIOLATION-A-Look-at-Non-Physical-Violence-in-Relationships-by-Spartacus-R.pdf
    • http://cefasfese.4pu.com/8737738737733733/Safe-Inside-the-Violence-by-Christopher-Irvin.pdf

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