Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cdb3dbf02d9665c…

MALICIOUS

PDF

16.7 KB Created: 2019-05-04 06:37:22 +01:00 Authoring application: mPDF 5.7
MD5: d722eeed590da5aa30d210220611f691 SHA-1: 54f6d7aaadce768e5dcec24f5a43a44b79311e5f SHA-256: 4cdb3dbf02d9665c22512e469b7c8437fe1ad891012c789336362cb7c2f06bf7
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm for SEO manipulation or to distribute malicious content. The ML classifier also flagged the PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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/1732733732736739/Bobbie-Faye-s-kinda-sorta-not-exactly-Family-Jewels-Bobbie-Faye-2-by-Toni-McGee-Causey.pdf
    • http://cefasfese.4pu.com/1731734739736731/Bobbie-Faye-s-Very-very-very-very-Bad-Day-Bobbie-Faye-1-by-Toni-McGee-Causey.pdf
    • http://cefasfese.4pu.com/1730738733739736730/Bobbie-Faye-Halb-so-wild-by-Toni-McGee-Causey.pdf
    • http://cefasfese.4pu.com/1737739735739730/Guns-and-Roses-PI-Julie-Collins-Bobbie-Faye-3-5-Rough-Riders-Bullet-Catcher-8-5-Shadow-Stalkers-3-Housewife-Assassin-by-Lori-G-Armstrong.pdf
    • http://cefasfese.4pu.com/4730734736735733/Kinda-Sorta-American-Dream-Collected-Stories-by-Steve-Karas.pdf
    • http://cefasfese.4pu.com/6730734735739738/Dreamcatcher-by-Bobbie-Russell.pdf
    • http://cefasfese.4pu.com/1733732735734/A-Dog-s-Way-Home-by-Bobbie-Pyron.pdf
    • http://cefasfese.4pu.com/1734739736738735/The-Ring-by-Bobbie-Pyron.pdf
    • http://cefasfese.4pu.com/9730739735730738/A-Koala-is-Not-a-Bear-by-Bobbie-Kalman.pdf
    • http://cefasfese.4pu.com/4737737735739738/The-Knot-Fairy-With-CD-by-Bobbie-Hinman.pdf
    • http://cefasfese.4pu.com/1730731731736738733/Verloren-in-der-Wildnis-by-Bobbie-Pyron.pdf
    • http://cefasfese.4pu.com/2737733731733730/Shiloh-and-Other-Stories-by-Bobbie-Ann-Mason.pdf
    • http://cefasfese.4pu.com/3736734731739731/Lone-Tree-by-Bobbie-O-39-keefe.pdf
    • http://cefasfese.4pu.com/3738738732737730/Finding-the-Light-by-Bobbie-Coelho.pdf
    • http://cefasfese.4pu.com/2733735737731736/Conspiracy-of-Secrets-by-Bobbie-Neate.pdf
    • http://cefasfese.4pu.com/1734731738732733/Elvis-Presley-A-Life-by-Bobbie-Ann-Mason.pdf
    • http://cefasfese.4pu.com/4734731733734731/Dirty-Rocker-Boys-by-Bobbie-Brown.pdf
    • http://cefasfese.4pu.com/1730735739736737733/Stay-the-Path-Navigating-the-Challenges-and-Wonder-of-Life-Love-and-Leadership-by-Bobbie-Houston.pdf
    • http://cefasfese.4pu.com/4735734731736733/Faye-by-N-J-Paige.pdf
    • http://cefasfese.4pu.com/1731736731738736/She-s-ALot-like-You-by-Faye-Hall.pdf
    • http://cefasfese.4pu.com/9730739735730738/A-Koala-is-Not-a-Bear-by-Bobbie-Kalm

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