Malicious PDF — malware analysis report

Static analysis result for SHA-256 687aeac8cffe7b11…

MALICIOUS

PDF

17.5 KB Created: 2019-05-01 16:21:36 +01:00 Authoring application: mPDF 5.7
MD5: 788683e90bd2779ac22cc16cc85c45eb SHA-1: 2875ddfa873faaa829c5b0527825a1f57d188d09 SHA-256: 687aeac8cffe7b1127f45bec5f9b49f861d4f5830c4955ea9fd78107226db79f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF documents, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier also flagged this PDF as malicious. While the URLs themselves are currently marked as benign, the sheer volume and the heuristic firing suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9788

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/6732737731739737/Romain-Rolland-Oeuvres-Majeures-L-dition-int-grale-Jean-Christophe-Au-dessus-de-la-m-l-e-Vie-de-Tolsto-Vie-de-Beethoven-Colas-Breugnon--L-me-enchant-by-Romain-Rolland.pdf
    • http://cefasfese.4pu.com/5734733732734733/Cl-rambault-by-Romain-Rolland.pdf
    • http://cefasfese.4pu.com/5734733732730730/Robespierre-by-Romain-Rolland.pdf
    • http://cefasfese.4pu.com/5734733733733731/Romain-Rolland-And-A-World-At-War-by-William-T-Starr.pdf
    • http://cefasfese.4pu.com/5733736735734738/Jean-Christophe-Journey-s-End-by-Romain-Rolland.pdf
    • http://cefasfese.4pu.com/5734733731738738/Life-of-Vivekananda-and-the-Universal-Gospel-by-Romain-Rolland.pdf
    • http://cefasfese.4pu.com/9738730731735732/Two-Plays-of-the-French-Revolution-The-Fourteenth-of-July-and-Danton-by-Romain-Rolland.pdf
    • http://cefasfese.4pu.com/5734733732735732/Romain-Rolland-and-the-Politics-of-Intellectual-Engagement-by-David-James-Fisher.pdf
    • http://cefasfese.4pu.com/1731733732730731736/Johann-Christof-Johann-Christof-Kinder-Und-Jugendjahre---2-johann-Christof-in-Paris---3-johann-Christof-Am-Ziel-by-Romain-Rolland.pdf
    • http://cefasfese.4pu.com/5734733732733739/Rosie-and-Rolland-in-the-Legendary-Show-and-Tell-by-Jon-Berg.pdf
    • http://cefasfese.4pu.com/5738730735736/The-Ski-Bum-by-Romain-Gary.pdf
    • http://cefasfese.4pu.com/5734733732737734/George-MacDonald-Victorian-Mythmaker-by-Rolland-Hein.pdf
    • http://cefasfese.4pu.com/3739735732735731/The-Life-Before-Us-by-Romain-Gary.pdf
    • http://cefasfese.4pu.com/5738736732733736/Lady-L-by-Romain-Gary.pdf
    • http://cefasfese.4pu.com/6732739738735/The-Life-Before-Us-by-Romain-Gary.pdf
    • http://cefasfese.4pu.com/2738731731737733/Ozark-Mountains-Dark-Side-Stories-by-Rolland-Love.pdf
    • http://cefasfese.4pu.com/6734737730733731/Solange-Chaput-Rolland-La-Soif-de-Liberte-by-Francine-Richer.pdf
    • http://cefasfese.4pu.com/5738735735734730/Carnets-de-Mariage-by-Romain-Ronzeau.pdf
    • http://cefasfese.4pu.com/5738736733733737/How-to-Do-Homework-Without-Throwing-Up-by-Trevor-Romain.pdf
    • http://cefasfese.4pu.com/5734733732737736/The-Tasmanian-Tiger-The-Elusive-Thylacine-Picture-Roo-Book-Series-by-Will-Rolland.pdf

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