Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3ccb31e8719c09…

MALICIOUS

PDF

17.9 KB Created: 2019-04-29 23:32:18 +01:00 Authoring application: mPDF 5.7
MD5: 4d183ded5bb5683df4b045fb8cfecebd SHA-1: 7f4b5efb21267b29f9e51f800baefb28247ba06e SHA-256: 9d3ccb31e8719c0962dee3692b4d3f7a76752568aa128ffe8089e41d13004811
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded URLs, identified as a link farm. While the specific URLs themselves are currently classified as benign, the heuristic 'PDF_SEO_LINK_FARM' indicates a pattern of generating many links, often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, and the document body was heavily corrupted, preventing a deeper analysis of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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/3a02a09a05a05a03/The-Old-Gray-Wolf-Charlie-Moon-17-by-James-D-Doss.pdf
    • http://muicuiu.dumb1.com/3a08a06a07a06a08/Three-Sisters-Charlie-Moon-12-by-James-D-Doss.pdf
    • http://muicuiu.dumb1.com/3a08a05a07a07a01/The-Shaman-Sings-Charlie-Moon-1-by-James-D-Doss.pdf
    • http://muicuiu.dumb1.com/3a05a09a07a09a07/Grandmother-Spider-Charlie-Moon-6-by-James-D-Doss.pdf
    • http://muicuiu.dumb1.com/2a02a08a06a04a02/The-Widow-s-Revenge-by-James-D-Doss.pdf
    • http://muicuiu.dumb1.com/6a07a06a04a00a08/The-Wolf-of-Dorian-Gray-The-Wolf-of-Dorian-Gray-1-by-Brian-S-Ference.pdf
    • http://muicuiu.dumb1.com/2a01a03a00a05a06/The-Children-of-the-Red-King-Books-1-5-Midnight-for-Charlie-Bone-Charlie-Bone-and-the-Time-Twister-Charlie-Bone-and-the-Invisible-Boy-Charlie-Bone-and-the-Castle-of-Mirrors-and-Charlie-Bone-and-the-Hidden-King-by-Jenny-Nimmo.pdf
    • http://muicuiu.dumb1.com/5a07a06a04a02/The-Gray-Wolf-and-Other-Fantasy-Stories-by-George-MacDonald.pdf
    • http://muicuiu.dumb1.com/3a05a01a00a04a04/The-Gray-Wolf-Throne-Seven-Realms-3-by-Cinda-Williams-Chima.pdf
    • http://muicuiu.dumb1.com/6a05a00a06a06/The-Gray-Wolf-Throne-Seven-Realms-3-by-Cinda-Williams-Chima.pdf
    • http://muicuiu.dumb1.com/2a05a08a09a08a02/The-Wolf-s-Moon-by-Patrick-Jones.pdf
    • http://muicuiu.dumb1.com/1a08a01a07a03a08/Wolf-Moon-by-Charles-de-Lint.pdf
    • http://muicuiu.dumb1.com/7a07a02a01a09a01/The-Wolf-and-His-Moon-Prince-Yamato-1-by-Angelique-Voisen.pdf
    • http://muicuiu.dumb1.com/1a00a09a04a03a09a04/The-Winter-Moon-s-Wolf-Men-of-Silo-3-by-Diana-DeRicci.pdf
    • http://muicuiu.dumb1.com/2a04a02a00a05a06/Cold-Moon-Rising-Cry-Wolf-2-by-Sarah-M-kel-.pdf
    • http://muicuiu.dumb1.com/2a07a08a06a08a05/Hunger-Moon-The-Mad-Wolf-s-Harem-Series-Book-0-by-Tabitha-Conall.pdf
    • http://muicuiu.dumb1.com/2a03a07a06a06a06/Full-Moon-Mating-Wolf-Creek-Pack-1-by-Stormy-Glenn.pdf
    • http://muicuiu.dumb1.com/1a04a01a06a04a08/By-Royal-Command-Young-James-Bond-5-by-Charlie-Higson.pdf
    • http://muicuiu.dumb1.com/4a03a09a01a00a09/Why-Did-You-Killed-Danny-Destroyed-World-In-2050-by-Charlie-James-Jr-.pdf
    • http://muicuiu.dumb1.com/2a05a04a07a02a09/Soldiers-Blue-and-Gray-by-James-I-Robertson-Jr-.pdf
    • http://muicuiu.dumb1.com/5a07a06a04a02/The-Gray-Wolf-and-Other-Fantasy-Stories-by-G

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