Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d36325ac22c1e4…

MALICIOUS

PDF

13.9 KB Created: 2019-04-30 05:14:33 +01:00 Authoring application: mPDF 5.7
MD5: 36c88223cdd74244097730301ddceb25 SHA-1: 28d8f43c482b5ad264820d15e8ec29662a906135 SHA-256: b5d36325ac22c1e467255627d49a26f86a61f1312de9eebf850d7025a513db92
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO spam or to distribute malicious content. The ML classifier strongly indicated maliciousness. While the specific intent of the links is unclear due to benign reputation labels, the sheer volume and the heuristic firing suggest a malicious distribution or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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://loaminoo.linkpc.net/3095096092095091/Power-and-Possession-Reckless-1-by-C-C-Gibbs.pdf
    • http://loaminoo.linkpc.net/2090093090090098/Terms-of-Possession-by-Elizabeth-Power.pdf
    • http://loaminoo.linkpc.net/4091098090099096/Reckless-Youth-Reckless---The-Smoky-Mountain-Trio-Book-1-by-Sierra-Hill.pdf
    • http://loaminoo.linkpc.net/9095090096096099/RECKLESS---The-Complete-Series-The-Reckless-1-5-by-Alice-Ward.pdf
    • http://loaminoo.linkpc.net/1099090091095099/Hard-amp-Reckless-Club-Reckless-1-by-Victoria-Ashley.pdf
    • http://loaminoo.linkpc.net/3095090090096092/Reckless-Rendezvous-Reckless-Beat-4-5-by-Eden-Summers.pdf
    • http://loaminoo.linkpc.net/9095090096098099/The-Right-Kind-of-Reckless-Reckless-Hearts-2-by-Heather-Van-Fleet.pdf
    • http://loaminoo.linkpc.net/3093096098091099/Reckless-Longing-Reckless-1-by-Gina-Robinson.pdf
    • http://loaminoo.linkpc.net/9095090097094093/Reckless-Devotion-Reckless-Devotion-1-by-Jennifer-Domenico.pdf
    • http://loaminoo.linkpc.net/9095090097094095/Reckless-Attraction-Reckless-Attraction-1-by-J-J-Knight.pdf
    • http://loaminoo.linkpc.net/2093099095098098/The-Spaces-Between-by-Martin-D-Gibbs.pdf
    • http://loaminoo.linkpc.net/1090095098093097093/Dinah-by-Mary-Ann-Gibbs.pdf
    • http://loaminoo.linkpc.net/4090095090096/Knight-s-Mistress-All-or-Nothing-1-by-C-C-Gibbs.pdf
    • http://loaminoo.linkpc.net/2096099098092099/Siblings-and-Secrets-by-E-Gibbs.pdf
    • http://loaminoo.linkpc.net/1094094096096095/Knight-s-Game-All-or-Nothing-2-by-C-C-Gibbs.pdf
    • http://loaminoo.linkpc.net/3090094095093/The-Presidents-Club-by-Nancy-Gibbs.pdf
    • http://loaminoo.linkpc.net/1099099095098095/Tuesday-s-Child-by-Carolyn-Gibbs.pdf
    • http://loaminoo.linkpc.net/5098091091093098/Papier-Mache-by-Dorothy-Gibbs.pdf
    • http://loaminoo.linkpc.net/1091097093090092/Island-of-Secrets-by-Tammie-Clarke-Gibbs.pdf
    • http://loaminoo.linkpc.net/1091096095097093094/Morels-of-Cardiff-by-John-Morel-Gibbs.pdf
    • http://loaminoo.linkpc.net/2093099095098098/The-Spaces

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