Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5929a8b4cafbc47…

MALICIOUS

PDF

20.7 KB Created: 2019-04-30 04:04:08 +01:00 Authoring application: mPDF 5.7
MD5: b3488dfae63730ef0312a0a9ef2d2fa4 SHA-1: 9c8dbfd235e1df9a98b5be36165e8b084fa228f7 SHA-256: f5929a8b4cafbc4784eaf4aab9597a1febecc9ba70097d403141c497e19034b1
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While many of these links point to benign book titles, the sheer volume and the heuristic's classification suggest a malicious intent, likely for SEO manipulation or to serve as a lure for further malicious activity. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://muicuiu.dumb1.com/1a01a07a04a06a03a01/From-Yellow-Star-to-Pop-Star-How-one-young-girl-survived-the-Holocaust-and-became-a-singing-sensation-by-Dorit-Oliver-Wolff.pdf
    • http://muicuiu.dumb1.com/2a09a06a08a03a07/A-Little-Yellow-Star-by-Faith-H-Tydings.pdf
    • http://muicuiu.dumb1.com/5a00a09a05a03a06/The-Doll-with-the-Yellow-Star-by-Yona-Zeldis-McDonough.pdf
    • http://muicuiu.dumb1.com/2a05a08a07a06a09/Star-Crossed-Stargazer-1-by-Jennifer-Echols.pdf
    • http://muicuiu.dumb1.com/9a07a03a05a08a01/Star-Sisters-and-the-Big-Show-by-Jennifer-Blecher.pdf
    • http://muicuiu.dumb1.com/9a07a03a05a08a03/Star-Sisters-and-the-Great-Skate-by-Jennifer-Blecher.pdf
    • http://muicuiu.dumb1.com/8a03a05a09a06a03/The-Darkest-Star-Sneak-Peek-Chapters-1-3-by-Jennifer-L-Armentrout.pdf
    • http://muicuiu.dumb1.com/5a01a05a07a09a04/Toronto-Star-Cookbook-More-than-150-Diverse-and-Delicious-Recipes-Celebrating-Ontario-by-Jennifer-Bain.pdf
    • http://muicuiu.dumb1.com/6a05a07a09a09/Star-by-Star-Star-Wars-The-New-Jedi-Order-9-by-Troy-Denning.pdf
    • http://muicuiu.dumb1.com/1a05a05a05a07a00/Star-Soldier-Doom-Star-1-by-Vaughn-Heppner.pdf
    • http://muicuiu.dumb1.com/1a04a04a00a08a05/Star-of-Fear-Star-of-Hope-by-Jo-Hoestlandt.pdf
    • http://muicuiu.dumb1.com/2a05a04a03a04/Star-Prince-Star-2-by-Susan-Grant.pdf
    • http://muicuiu.dumb1.com/3a09a06a09a05a03/The-Star-King-Star-1-by-Susan-Grant.pdf
    • http://muicuiu.dumb1.com/1a02a04a06a06/Star-King-Star-1-by-Susan-Grant.pdf
    • http://muicuiu.dumb1.com/2a08a07a06/Porn-Star-P-rn-Star-1-by-Laurelin-Paige.pdf
    • http://muicuiu.dumb1.com/6a06a01a05a09a03/Star-Wars-Chevaliers-de-l-ancienne-r-publique-T01-Il-y-a-bien-longtemps-Star-Wars-Knights-of-the-Old-Republic-1-by-John-Jackson-Miller.pdf
    • http://muicuiu.dumb1.com/9a06a08a08a07a03/Star-Wars-Das-Imperium-schl-gt-zur-ck---Du-willst-also-ein-Jedi-werden-Star-Wars-Illustrated-Novels-2-by-Adam-Gidwitz.pdf
    • http://muicuiu.dumb1.com/9a04a07a03a06a02/Star-Wars-Leia-Prinzessin-von-Alderaan-Journey-to-Star-Wars-Die-letzten-Jedi-by-Claudia-Gray.pdf
    • http://muicuiu.dumb1.com/1a09a03a07a09a05/Star-Wars-Roleplaying-Game-Saga-Edition-Core-Rulebook-Star-Wars-RPG-D20-by-Christopher-Perkins.pdf
    • http://muicuiu.dumb1.com/2a09a05a06a01a09/Rock-Star-Revenge-BWWM-Interracial-Menage-Rock-Star-Box-Set-Collection-by-Jezebel-Divelle.pdf
    • http://muicuiu.dumb1.com/6a

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