Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f1ab94432b29d47…

MALICIOUS

PDF

16.4 KB Created: 2019-05-03 06:02:08 +01:00 Authoring application: mPDF 5.7
MD5: 849c3a0041bae8919b41698492e3825b SHA-1: ac7c022480523b62716027e37474c7b816d52f23 SHA-256: 8f1ab94432b29d47b9f3030db6ba87cbb0832d35a165a0b293e5bfc509a0eeb2
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier as malicious and contains a large number of embedded links, indicating a potential SEO poisoning or link farm attack. While the document body is heavily obfuscated, the presence of numerous links to external PDFs suggests an attempt to redirect users or manipulate search engine results. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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/7a00a04a06a09a00/Conan-the-Avenger-Book-10-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/7a00a04a06a06a02/Conan-The-Freebooter-Conan-3-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/1a06a04a02a02a07/The-Conan-Chronicles-Volume-1-The-People-of-the-Black-Circle-The-Conan-Chronicles-1-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/1a06a03a04a05a07/The-Essential-Conan-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/1a08a01a04a03a00/Conan-the-Conqueror-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/3a04a09a00a08a04/Conan-the-Barbarian-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/7a00a04a07a09a01/Conan-the-Barbarian-The-Complete-Collection-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/3a03a05a06a00a08/Conan-the-Barbarian-The-Stories-that-Inspired-the-Movie-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/2a08a09a06a03a01/Waterfront-Fists-And-Others-The-Collected-Fight-Stories-Of-Robert-E-Howard-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/2a05a00a07a03a04/Avenger-Sanctuary-2-by-Robert-J-Crane.pdf
    • http://muicuiu.dumb1.com/2a07a08a00a04/The-Adventures-of-Blue-Avenger-Blue-Avenger-1-by-Norma-Howe.pdf
    • http://muicuiu.dumb1.com/3a06a08a07a05a01/Little-Book-of-Restorative-Justice-A-Bestselling-Book-By-One-Of-The-Founders-Of-The-Movement-by-Howard-Zehr.pdf
    • http://muicuiu.dumb1.com/3a00a05a06a04a07/Almuric-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/4a06a02a06a07a05/The-Dream-Snake-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/4a05a02a09a08a06/The-Sword-Woman-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/2a08a09a02a04a03/The-Scarlet-Citadel-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/9a05a07a07a00/Marchers-of-Valhalla-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/2a08a09a02a05a01/The-Slithering-Shadow-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/2a08a09a02a06a03/Gods-of-the-North-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/2a08a09a02a05a07/Shadows-In-The-Moonlight-by-Robert-E-Howard.pdf
    • http://muicuiu.dumb1.com/3a03a05a06a00a08/Conan-the-Barbaria

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