Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c629d572b63373…

MALICIOUS

PDF

15.4 KB Created: 2019-05-02 01:33:32 +01:00 Authoring application: mPDF 5.7
MD5: e5833bca493ff028506fbe18583dfcbb SHA-1: e86831c61a065a925ac7cb60ff9a47c69fc82c29 SHA-256: f5c629d572b6337368f856c31ba9578bd9eb2f49ce079231439d03c98baf4d91
90 Risk Score

Malware Insights

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

The PDF contains a link farm with 21 external URLs, as indicated by the PDF_SEO_LINK_FARM heuristic. While the document body is heavily obfuscated, the presence of numerous links suggests an attempt to direct users to potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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.du
    • http://muicuiu.dumb1.com/4a07a01a03a09a01/Shadow-Star-2---Darkness-Visible-by-Mohiro-Kitoh.pdf
    • http://muicuiu.dumb1.com/4a07a01a04a07a03/Shadow-Star-4---Nothing-But-The-Truth-by-Mohiro-Kitoh.pdf
    • http://muicuiu.dumb1.com/4a07a01a05a04a08/Shadow-Star-5---A-Flower-s-Fragrance-by-Mohiro-Kitoh.pdf
    • http://muicuiu.dumb1.com/6a09a04a06a04a05/Bokurano-Ours-Vol-3-by-Mohiro-Kitoh.pdf
    • http://muicuiu.dumb1.com/2a06a06a05a01a03/Bokurano-Ours-Vol-1-by-Mohiro-Kitoh.pdf
    • http://muicuiu.dumb1.com/6a09a04a06a04a08/Bokurano-Ours-Vol-5-by-Mohiro-Kitoh.pdf
    • http://muicuiu.dumb1.com/6a09a04a06a05a00/Bokurano-Ours-Vol-6-by-Mohiro-Kitoh.pdf
    • http://muicuiu.dumb1.com/1a05a01a01a09a09/Darkness-Visible-by-Pip-Janssen.pdf
    • http://muicuiu.dumb1.com/4a02a08a05a05/A-Visible-Darkness-Max-Freeman-2-by-Jonathon-King.pdf
    • http://muicuiu.dumb1.com/3a06a06a09a09a01/Visible-Through-Darkness-The-Jura-Series-1-by-Auden-Johnson.pdf
    • http://muicuiu.dumb1.com/1a00a01a09a00a07a05/Darkness-Visible-The-Book-of-Lilith-by-Priscilla-McGreer.pdf
    • http://muicuiu.dumb1.com/6a04a05a05a01a06/Felures-Dans-le-Visible-Rifts-in-the-Visible-by-Inge-Israel.pdf
    • http://muicuiu.dumb1.com/9a03a03a09a09/Shadow-of-Darkness-Creature-Kid-1-by-Rashad-Freeman.pdf
    • http://muicuiu.dumb1.com/2a04a03a01a04a05/When-Darkness-Hungers-The-Shadow-Keepers-5-by-J-K-Beck.pdf
    • http://muicuiu.dumb1.com/1a01a00a04a03a01/Under-the-Shadow-of-Darkness-Apprentice-1-by-James-Cardona.pdf
    • http://muicuiu.dumb1.com/1a03a01a06a02a00/Realm-of-Darkness-Codename-SHADOW-by-James-Tomas.pdf
    • http://muicuiu.dumb1.com/5a06a08a07a05a06/Of-Darkness-and-Dawn-Elder-Empire-Shadow-2-by-Will-Wight.pdf
    • http://muicuiu.dumb1.com/4a04a01a05a07a04/Forgotten-Darkness-The-Shadow-Demons-Saga-8-by-Sarra-Cannon.pdf
    • http://muicuiu.dumb1.com/4a09a02a07a03a05/The-Shadow-Walkers-Ghost-Series-Books-1-3-Lost-in-Shadow-Desired-by-Shadow-Iced-in-Shadow-by-Cynthia-Luhrs.pdf
    • http://muicuiu.dumb1.com/3a06a08a02a03a00/The-First-Star-to-Fall-For-Darkness-Shows-the-Stars-1-5-by-Diana-Peterfreund.pdf

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