Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4df88cc797dc887…

MALICIOUS

PDF

17.1 KB Created: 2019-04-30 08:16:57 +01:00 Authoring application: mPDF 5.7
MD5: df950f346421c88c739a07622c5127c1 SHA-1: 9e735a32cda1b88d83829f75723f42aaf98ffdd9 SHA-256: c4df88cc797dc8879641fcea9b09fdd5a7dc965b4ab785b2effd72c892f5c37f
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. While the ML classifier flagged this as malicious, the specific URLs extracted are currently marked as benign. The document body is heavily obfuscated, preventing a clear understanding of its immediate purpose beyond linking to external content. The primary attack pattern appears to be a link farm, potentially for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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/5a00a01a08a00/Fast-Trapped-Fast-Track-Trilogy-2-by-Tracy-Rozzlynn.pdf
    • http://muicuiu.dumb1.com/5a09a03a09a09/Fast-Tracked-Fast-Track-Trilogy-1-by-Tracy-Rozzlynn.pdf
    • http://muicuiu.dumb1.com/1a03a02a07a08a08/Hard-and-Fast-Fast-Track-2-by-Erin-McCarthy.pdf
    • http://muicuiu.dumb1.com/9a07a03a06a09a01/A-Fast-Guide-To-A-Fast-Computer-by-Andrew-Blecher.pdf
    • http://muicuiu.dumb1.com/1a00a05a01a03a09a01/Fast-Fury-DEA-FAST-5-by-Kaylea-Cross.pdf
    • http://muicuiu.dumb1.com/3a01a08a02a01a08/Leopard-at-the-Lodge-Animal-Ark-Series-44-Animal-Ark-in-South-Africa-by-Lucy-Daniels.pdf
    • http://muicuiu.dumb1.com/9a02a02a09/The-End-of-Animal-Farming-How-Scientists-Entrepreneurs-and-Activists-Are-Building-an-Animal-Free-Food-System-by-Jacy-Reese.pdf
    • http://muicuiu.dumb1.com/4a06a08a01a07a01/Animal-Attraction-Animal-Magnetism-2-by-Jill-Shalvis.pdf
    • http://muicuiu.dumb1.com/5a00a04a09a07a09/Animal-Attraction-Animal-Magnetism-2-by-Jill-Shalvis.pdf
    • http://muicuiu.dumb1.com/1a02a04a06a00a05/Fast-Fast-1-by-Ryan-Ringbloom.pdf
    • http://muicuiu.dumb1.com/3a06a06a00a04a07/Life-in-the-Fast-Lane-2nd-edition-Fast-Lane-Series-by-Michelle-McCorkle.pdf
    • http://muicuiu.dumb1.com/7a08a06a04a05a04/Making-Marvelous-Wooden-Puzzles-70-Animal-Families-70-Animal-Families-by-Saburo-Oguro.pdf
    • http://muicuiu.dumb1.com/8a04a00a07a09a05/Daniel-Fast-Pasta-30-Daniel-Fast-Pasta-Recipes-For-Everyday-Cooking-by-Dee-Wallace.pdf
    • http://muicuiu.dumb1.com/4a00a05a03a06a07/Animal-Magnetism-Animal-Magnetism-1-by-Jill-Shalvis.pdf
    • http://muicuiu.dumb1.com/1a01a07a08a08a05a08/Think-Fast-Die-Last-by-H-C-Elliston.pdf
    • http://muicuiu.dumb1.com/4a00a00a06a03a02/Being-Red-by-Howard-Fast.pdf
    • http://muicuiu.dumb1.com/6a09a02a01a01a02/Spartacus-by-Howard-Fast.pdf
    • http://muicuiu.dumb1.com/4a09a09a04a00a08/The-Children-by-Howard-Fast.pdf
    • http://muicuiu.dumb1.com/1a01a01a08a07a01a07/Fast-verbunden-3-by-U-Voss.pdf
    • http://muicuiu.dumb1.com/2a07a01a02a03a07/Going-Nowhere-Fast-by-Kati-Wilde.pdf
    • http://muicuiu.dumb1.com/5a00a04a09a07a09/Anima

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