Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca302aeb6b560dd0…

MALICIOUS

PDF

18.9 KB Created: 2019-04-30 04:01:15 +01:00 Authoring application: mPDF 5.7
MD5: 807aa2e839640ccd0549163ee3aaaa2f SHA-1: c4e6469e5b8e1ca6b4edd3ca64be6f3b0c585190 SHA-256: ca302aeb6b560dd01c3de20819ade608707a3ae629d34233fc0e086debb80b3b
90 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of embedded external links, characteristic of a link farm or a distribution mechanism for further malicious content. The primary heuristic indicates a 'PDF_SEO_LINK_FARM' with numerous links to other PDF files, suggesting an attempt to manipulate search engine results or redirect users to potentially harmful sites. While the specific intent of the linked PDFs is unclear, the sheer volume and nature of the links point towards a malicious distribution or SEO poisoning attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/2a06a03a00a01/Sleepside-The-Collected-Fantasies-of-Greg-Bear-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/3a02a05a05a07a04/Eon-The-Way-1-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/2a04a05a07a08/Tangents-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/4a09a09a04a02a04/Hegira-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/1a00a01a06a03a02a03/Legacy-The-Way-3-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/1a04a08a05a09a05/Dinosaur-Summer-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/3a09a02a03a07a01/Mariposa-A-Quantico-Novel-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/2a04a05a09a04/Blood-Music-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/2a06a07a07a05/The-Serpent-Mage-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/9a06a08a00a04a03/Die-Schmiede-Gottes-Forge-of-God-1-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/1a05a09a09a03a06/Anvil-of-Stars-Forge-of-God-2-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/4a00a07a00a00/Songs-of-Earth-and-Power-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/2a04a09a02a03/Moving-Mars-Queen-of-Angels-3-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/9a00a03a02a03/Star-Wars-Rogue-Planet-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/1a00a03a00a02a02a05/Multiverse-Exploring-Poul-Anderson-s-Worlds-by-Greg-Bear.pdf
    • http://muicuiu.dumb1.com/8a07a00a05a09a04/King-s-Quest-Omnipedia---Kq3-Characters-Forbidden-Items-Places-Alexander-Baby-Bear-Bandits-Chickens-Fish-Gertrude-Graham-Gwydion-Lizard-Mama-Bear-Manannan-Medusa-Papa-Bear-Rosella-Rumplestiltskin-Squirrel-the-Oracle-Thor-by-Source-Wikia.pdf
    • http://muicuiu.dumb1.com/5a06a08a05a01a05/The-Collected-Fantasies-Vol-8-Mississippi-River-The-Collected-Fantasies-of-Jean-Giraud-8-by-M-bius.pdf
    • http://muicuiu.dumb1.com/4a04a02a09a09a01/The-Collected-Fantasies-Vol-1-Upon-a-Star-The-Collected-Fantasies-of-Jean-Giraud-1-by-M-bius.pdf
    • http://muicuiu.dumb1.com/3a02a08a06a02a07/Bear-Seeking-Bride-Travis-Bear-Canyon-Brides-1-by-Ruby-Shae.pdf
    • http://muicuiu.dumb1.com/5a04a08a02a01a04/Bear-Witness-to-Murder-Shamelessly-Adorable-Teddy-Bear-Mystery-2-by-Meg-Macy.pdf
    • http://muicuiu.dumb1.com/9a06a08a00a04a03/Die-Schmiede-Gottes-Forge-of-

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