Malicious PDF — malware analysis report

Static analysis result for SHA-256 586c91661eeb87a8…

MALICIOUS

PDF

14.6 KB Created: 2019-05-02 06:10:04 +01:00 Authoring application: mPDF 5.7
MD5: 0784ec6e5e1dc9a63ea192c54ae1a80e SHA-1: 99edc41a89b4b2920ff99ad275768d526888655d SHA-256: 586c91661eeb87a8c7739ba2a99c596eefc11f04056fc1a8be7ca11ea6e4e2b5
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample. The primary attack pattern involves directing users to a link farm hosted on 'cefasfese.4pu.com'.

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/8739734738734734/Wet-Work-by-Christopher-Buckley.pdf
    • http://cefasfese.4pu.com/1737737732735737/They-Eat-Puppies-Don-t-They-by-Christopher-Buckley.pdf
    • http://cefasfese.4pu.com/1733730738737737/Little-Green-Men-by-Christopher-Buckley.pdf
    • http://cefasfese.4pu.com/3736738738738730/The-White-House-Mess-by-Christopher-Buckley.pdf
    • http://cefasfese.4pu.com/1731734733735731732/Lady-Jasmine-by-Victoria-Christopher-Murray.pdf
    • http://cefasfese.4pu.com/3734736739733730/Sweetest-Treat-Cursed-1-by-A-R-Von.pdf
    • http://cefasfese.4pu.com/1737731731734738/A-Wicked-Treat-by-Crimson-Syn.pdf
    • http://cefasfese.4pu.com/1738738739733737/Midnight-Treat-by-Sally-Painter.pdf
    • http://cefasfese.4pu.com/3733732739735737/Dutch-Treat-by-Andrew-Grey.pdf
    • http://cefasfese.4pu.com/9730730735735733/Trix-amp-a-Treat-by-Aliyah-Burke.pdf
    • http://cefasfese.4pu.com/1731738733734737732/Treat-Your-Own-Back-by-Robin-McKenzie.pdf
    • http://cefasfese.4pu.com/3738732731731734/Trick-or-Treat-by-Louis-Slobodkin.pdf
    • http://cefasfese.4pu.com/2737737732733730/Treat-Me-Kindly-by-Briana-Lawrence.pdf
    • http://cefasfese.4pu.com/5739738733735732/Somewhere-in-Heaven-The-Remarkable-Love-Story-of-Dana-and-Christopher-Reeve-by-Christopher-Andersen.pdf
    • http://cefasfese.4pu.com/1730737736731731732/Muffins-by-Tim-Buckley.pdf
    • http://cefasfese.4pu.com/3738732731736738/Trick-or-Treat-Halloween-by-Sharon-Peters.pdf
    • http://cefasfese.4pu.com/1730735730731730732/Pinkalicious-Pink-or-Treat-by-Victoria-Kann.pdf
    • http://cefasfese.4pu.com/9737731734739731/Future-of-Vineland-A-Lecture-by-Joseph-Treat.pdf
    • http://cefasfese.4pu.com/3738731739732736/Mickey-s-Halloween-Treat-by-Thea-Feldman.pdf
    • http://cefasfese.4pu.com/1733735739737730/Trickery-Treat-Charmed-41-by-Diana-G-Gallagher.pdf
    • http://cefasfese.4pu.com/2737737732733

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