Malicious PDF — malware analysis report

Static analysis result for SHA-256 812deca9faab3938…

MALICIOUS

PDF

15.5 KB Created: 2019-05-02 06:09:44 +01:00 Authoring application: mPDF 5.7
MD5: 082ca9209a0ad2365edd9dae98e86b0c SHA-1: fa9d76b4197fcd68ea8ad6422bcc2c7bc442d606 SHA-256: 812deca9faab39389085fe537f9e63ff3d7002086d357f5eedc075c71cb51105
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a large number of embedded links, indicating a potential SEO poisoning or link farm attack. The primary heuristic identified a link farm with 32 external PDF links, many of which are generated with numeric slugs. While the document body is heavily obfuscated, the presence of numerous links suggests an attempt to manipulate search results or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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/4738739739733734/Riding-Towards-the-Light-An-Apprenticeship-in-the-Art-of-Dressage-Riding-by-Paul-Belasik.pdf
    • http://cefasfese.4pu.com/6733732737731/Milky-Way-Bar-by-Bill-Manhire.pdf
    • http://cefasfese.4pu.com/1738735731731735/Through-the-Milky-Way-on-a-PB-amp-J-by-James-McDonald.pdf
    • http://cefasfese.4pu.com/6732735731736734/Route-66-to-the-Milky-Way-by-Janet-Rendall.pdf
    • http://cefasfese.4pu.com/2738738732731737/Her-Milky-Toll-by-Calloway-North.pdf
    • http://cefasfese.4pu.com/4735736731739737/Riding-Steele-Kidnapped-Riding-Steele-1-by-Opal-Carew.pdf
    • http://cefasfese.4pu.com/4735736733730730/Riding-Steele-Aftershock-Riding-Steele-6-by-Opal-Carew.pdf
    • http://cefasfese.4pu.com/4735736737730731/Riding-Steele-Crossroads-Riding-Steele-5-by-Opal-Carew.pdf
    • http://cefasfese.4pu.com/4735736731738735/Riding-Steele-Collide-Riding-Steele-3-by-Opal-Carew.pdf
    • http://cefasfese.4pu.com/4735736732739731/Riding-Steele-Wanted-Riding-Steele-4-by-Opal-Carew.pdf
    • http://cefasfese.4pu.com/8732737734733730/The-Hat-by-Babette-Hughes.pdf
    • http://cefasfese.4pu.com/8734734731733735/The-Milky-Way-Poems-1967-1982-by-Jon-Anderson.pdf
    • http://cefasfese.4pu.com/3734739737735734/Night-of-the-Milky-Way-Railway-by-Kenji-Miyazawa.pdf
    • http://cefasfese.4pu.com/8739738731737732/Stefanie-by-Babette-Mateluhn.pdf
    • http://cefasfese.4pu.com/1739739739739739/The-Trouble-with-Dad-by-Babette-Cole.pdf
    • http://cefasfese.4pu.com/2730735731735735/Prince-Cinders-by-Babette-Cole.pdf
    • http://cefasfese.4pu.com/4735737731738733/Princess-Smartypants-by-Babette-Cole.pdf
    • http://cefasfese.4pu.com/1738736734735739/Babette-s-Feast-by-Isak-Dinesen.pdf
    • http://cefasfese.4pu.com/1731738735737733739/Mit-dem-Fahrrad-zur-Milchstra-e-With-the-Bicycle-to-the-Milky-Way-by-Erika-Hoffmann-Koenige.pdf
    • http://cefasfese.4pu.com/4738730738734730/Mommy-Laid-An-Egg-Or-Where-Do-Babies-Come-From-by-Babette-Cole.pdf

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