Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dbb55f5bdc243c4…

MALICIOUS

PDF

17.1 KB Created: 2019-05-02 12:47:50 +01:00 Authoring application: mPDF 5.7
MD5: 805f7fb5ff9d5048f6c6c4f582bad3ab SHA-1: f562c37946bdcead0ef3fda8f3c1ca199375b1a3 SHA-256: 6dbb55f5bdc243c4f66b09be4ad02a0130e9b9fdb61297da9a86df1641d25534
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation 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/9731739739732731/Video-Girl-Ai-Vol-05-Spinoff-by-Masakazu-Katsura.pdf
    • http://cefasfese.4pu.com/9731739739731732/Video-Girl-Ai-Vol-04-Off-Line-by-Masakazu-Katsura.pdf
    • http://cefasfese.4pu.com/9731739738734733/Video-Girl-Ai-Vol-03-Recall-by-Masakazu-Katsura.pdf
    • http://cefasfese.4pu.com/9731739739732738/Video-Girl-Ai-Vol-07-Retake-by-Masakazu-Katsura.pdf
    • http://cefasfese.4pu.com/9731739738733735/Illuminating-Video-An-Essential-Guide-to-Video-Art-by-Doug-Hall.pdf
    • http://cefasfese.4pu.com/8730739737730734/Arm-of-Kannon-Volume-2-by-Masakazu-Yamaguchi.pdf
    • http://cefasfese.4pu.com/2735736738738736/Roger-Ebert-s-Video-Companion-1997-with-Pocket-Video-Guide-by-Roger-Ebert.pdf
    • http://cefasfese.4pu.com/1731738733736734/Despite-Them-Big-Deal-3-by-Katsura.pdf
    • http://cefasfese.4pu.com/9739736737739/Onani-Master-Kurosawa-1-by-Katsura-Ise.pdf
    • http://cefasfese.4pu.com/1732733737731730/Lesson-In-Betrayal-Big-Deal-2-by-Katsura.pdf
    • http://cefasfese.4pu.com/1731735734731731739/Spinoff-by-naturalbornderpy.pdf
    • http://cefasfese.4pu.com/1731735737736737/-Kench-No-Hoshi-by-Nozomi-Katsura.pdf
    • http://cefasfese.4pu.com/1731735734732731737/Spinoff-2006-by-NASA.pdf
    • http://cefasfese.4pu.com/9730734734738/Untitled-The-Dark-Duet-Spinoff-by-C-J-Roberts.pdf
    • http://cefasfese.4pu.com/1731735734732737736/Feral-Many-Lives-Spinoff-1-by-Laxmi-Hariharan.pdf
    • http://cefasfese.4pu.com/1731735734732731738/Corpies-Super-Powereds-Spinoff-1-by-Drew-Hayes.pdf
    • http://cefasfese.4pu.com/1731735734732737730/The-Emissary-A-Riverbend-Spinoff-Novella-by-Marcia-Meara.pdf
    • http://cefasfese.4pu.com/1731735734731731734/Deadly-Prophecy-Second-Sight-Spinoff-by-Heather-Topham-Wood.pdf
    • http://cefasfese.4pu.com/8733739730732/Taut-The-Ford-Book-Rook-and-Ronin-Spinoff-by-J-A-Huss.pdf
    • http://cefasfese.4pu.com/7736737734736730/Liste-de-Jeux-Video-Par-Genre-Liste-Chronologique-Des-Shoot-Them-Up-Liste-Chronologique-Des-Run-and-Gun-Liste-Chronologique-Des-Jeux-de-Tir-Au-Pistolet-Liste-Des-Jeux-Video-de-Saisons-de-Sport-Automobile-by-Source-Wikipedia.pdf