Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b243d05a994941…

MALICIOUS

PDF

17.9 KB Created: 2019-05-01 14:15:30 +01:00 Authoring application: mPDF 5.7
MD5: b58e145dcf0ecee125dbe8d2130723ec SHA-1: 52a4d45a0467cba01c787c66abd66fdb9b4dc039 SHA-256: 27b243d05a99494100f2d9549c014f7026fd487d6d0cbff9bfee5947cf19990f
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, preventing a deeper analysis of its specific intent beyond the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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/4a04a00a07a02a00/The-Magestaff-The-Seven-Kingdoms-1-by-Cordelia-Castel.pdf
    • http://muicuiu.dumb1.com/8a03a02a02a08a03/The-Bluebird-The-Seven-Kingdoms-9-by-Cordelia-Castel.pdf
    • http://muicuiu.dumb1.com/3a08a02a08a02a04/The-Twelve-Kingdoms-The-Talon-of-the-Hawk-The-Twelve-Kingdoms-3-by-Jeffe-Kennedy.pdf
    • http://muicuiu.dumb1.com/4a07a00a00a07a06/The-Twelve-Kingdoms-The-Tears-of-the-Rose-The-Twelve-Kingdoms-2-by-Jeffe-Kennedy.pdf
    • http://muicuiu.dumb1.com/3a00a07a04a03a08/The-Twelve-Kingdoms-Skies-of-Dawn-The-Twelve-Kingdoms-4-by-Fuyumi-Ono.pdf
    • http://muicuiu.dumb1.com/4a03a09a06a05a07/Ruled-by-Shadows-Light-and-Darkness-1-by-Jayne-Castel.pdf
    • http://muicuiu.dumb1.com/5a02a04a06a01a09/Falling-Kingdoms-Falling-Kingdoms-1-by-Morgan-Rhodes.pdf
    • http://muicuiu.dumb1.com/3a03a08a06a08/Falling-Kingdoms-Falling-Kingdoms-1-by-Morgan-Rhodes.pdf
    • http://muicuiu.dumb1.com/8a00a06a04a06/The-Miracle-of-Castel-di-Sangro-A-Tale-of-Passion-and-Folly-in-the-Heart-of-Italy-by-Joe-McGinniss.pdf
    • http://muicuiu.dumb1.com/6a02a06a07a05/Control-by-Cordelia-Kingsbridge.pdf
    • http://muicuiu.dumb1.com/1a09a04a07a07a05/Skyscraping-by-Cordelia-Jensen.pdf
    • http://muicuiu.dumb1.com/1a00a03a05a06a00a04/Can-t-Hide-from-Me-by-Cordelia-Kingsbridge.pdf
    • http://muicuiu.dumb1.com/1a03a06a02a09a03/Cordelia-by-Grace-Chia.pdf
    • http://muicuiu.dumb1.com/9a09a06a04a07/Lemon-by-Cordelia-Strube.pdf
    • http://muicuiu.dumb1.com/6a00a02a09a01/Dolly-City-Hebrew-Literature-Series-by-Dalya-Bilu-Orly-Castel-Bloom.pdf
    • http://muicuiu.dumb1.com/6a00a05a06a04a09/Bielorussie-Une-Independance-a-la-Derive-Un-Nouveau-Defi-Pour-L-Europe-de-Demain-by-Viviane-Du-Castel.pdf
    • http://muicuiu.dumb1.com/3a05a01a02a06a06/Delusions-of-Gender-by-Cordelia-Fine.pdf
    • http://muicuiu.dumb1.com/3a02a08a06a04a04/Duality-Cordelia-Kelly-1-by-E-R-Pierce.pdf
    • http://muicuiu.dumb1.com/3a03a09a04a01a02/One-Eyed-Royals-Seven-of-Spades-4-by-Cordelia-Kingsbridge.pdf
    • http://muicuiu.dumb1.com/4a08a06a09a00a08/On-the-Shores-of-Darkness-There-Is-Light-by-Cordelia-Strube.pdf
    • http://muicuiu.dumb1.com/5a02a04a06a0

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