Malicious PDF — malware analysis report

Static analysis result for SHA-256 810129d38a5bc1e4…

MALICIOUS

PDF

18.3 KB Created: 2019-05-02 14:14:46 +01:00 Authoring application: mPDF 5.7
MD5: dd3228a1e169ddeb92fa9333b4e0c7eb SHA-1: 8945770f1155277ed7b42d6d1899bbe8192c919c SHA-256: 810129d38a5bc1e46262dadda08b0082786f55611c499bed3a21a0959972ae33
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 files, a technique often used for SEO manipulation or to distribute further 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 resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9754

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/1730738738732734736/Ant-Ant-Ant-An-Insect-Chant-by-April-Pulley-Sayre.pdf
    • http://cefasfese.4pu.com/8734730736731737/Noodle-Man-the-Pasta-Superhero-The-Pasta-Superhero-by-April-Pulley-Sayre.pdf
    • http://cefasfese.4pu.com/1735736736737/Sixties-Going-on-Seventies-by-Nora-Sayre.pdf
    • http://cefasfese.4pu.com/8730730731739732/Moby-Dick-by-Lew-Sayre-Schwartz.pdf
    • http://cefasfese.4pu.com/2731732738730736/The-Buried-Book-by-D-M-Pulley.pdf
    • http://cefasfese.4pu.com/3738732739/The-Buried-Book-by-D-M-Pulley.pdf
    • http://cefasfese.4pu.com/6732732732/The-Bedlam-Stacks-by-Natasha-Pulley.pdf
    • http://cefasfese.4pu.com/1733730732730737/The-Watchmaker-of-Filigree-Street-by-Natasha-Pulley.pdf
    • http://cefasfese.4pu.com/1730734734732735730/Korean-War-Phase-4-25-January---21-April-1951-First-UN-Counteroffensive-and-22-April---8-July-1951-CCF-Spring-Offensive-by-John-Elsberg.pdf
    • http://cefasfese.4pu.com/9733738739735731/Proceedings-of-the-Second-April-Conference-of-University-Teachers-of-English-Cracow-1981-April-23-29-Papers-in-English-and-American-Literature-Cul-by-Irena-Kaluza.pdf
    • http://cefasfese.4pu.com/1738734736734738/His-Bear-s-Necessity-Return-To-Bear-Bluff-2-by-Harmony-Raines.pdf
    • http://cefasfese.4pu.com/2735733738738739/The-Little-Bear-and-the-Big-Bear-A-story-designed-to-help-teach-children-how-to-deal-with-frustration-anxiety-and-anger-by-Monica-Dumont.pdf
    • http://cefasfese.4pu.com/9732732733738738/The-Witness-and-the-Bear-Bear-Valley-Shifters-1-by-T-S-Joyce.pdf
    • http://cefasfese.4pu.com/2732736733734730/Bear-The-Heat-Bear-Instincts-1-by-Catherine-Vale.pdf
    • http://cefasfese.4pu.com/2737737732739/A-Visitor-for-Bear-Bear-and-Mouse-1-by-Bonny-Becker.pdf
    • http://cefasfese.4pu.com/8730738738731731/Little-Brown-Bear-Plays-in-the-Snow-Little-Brown-Bear-Series-by-Claude-Lebrun.pdf
    • http://cefasfese.4pu.com/3732734732738/Manifestation-Wolverine-The-Collected-Poetry-of-Ray-Young-Bear-by-Ray-Young-Bear.pdf
    • http://cefasfese.4pu.com/2736733730731/Sleepside-The-Collected-Fantasies-of-Greg-Bear-by-Greg-Bear.pdf
    • http://cefasfese.4pu.com/9732732734735735/Bear-Valley-Valentine-Bear-Valley-Shifters-5-5-by-T-S-Joyce.pdf
    • http://cefasfese.4pu.com/4735735733734734/Puck-Bear-Brides-Complete-Series-Puck-Bear-Brides-1-4-by-Anya-Nowlan.pdf

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