Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6c376095c4e0cc…

MALICIOUS

PDF

16.3 KB Created: 2019-05-02 01:23:21 +01:00 Authoring application: mPDF 5.7
MD5: 638a601d626e6f8dd7403f7f18b7ce21 SHA-1: 613a98cc84dd89e0c7b6b251c9dad88d91ef65ee SHA-256: 5e6c376095c4e0ccbce9b688b6523f1bcd10fef3e15d864783b7d7146a6fe744
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, identified as a 'PDF_SEO_LINK_FARM' heuristic. While the URLs themselves are marked as benign, the sheer volume and structure suggest a malicious intent to manipulate search engine results or distribute content through a link farm. The ML classifier also flagged the document as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9811

Heuristics 3

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/2a03a09a08a08a00/Gateway-to-Thera-by-Jeffrey-Allen-Davis.pdf
    • http://muicuiu.dumb1.com/8a03a09a01a07a03/Pirate-Invasion-Diary-of-a-6th-Grade-Ninja-2-by-Marcus-Emerson.pdf
    • http://muicuiu.dumb1.com/3a08a03a07a05a01/Gettysburg-The-Last-Invasion-by-Allen-C-Guelzo.pdf
    • http://muicuiu.dumb1.com/4a00a02a01a09a06/Gone-Away-Into-the-Land-by-Jeffrey-B-Allen.pdf
    • http://muicuiu.dumb1.com/1a05a05a00a03a05/The-Former-Hero-by-Jeffrey-Allen-Mays.pdf
    • http://muicuiu.dumb1.com/1a00a09a07a04a02a08/Fiscal-and-Macroeconomic-Impact-of-Privatization-by-Jeffrey-M-Davis.pdf
    • http://muicuiu.dumb1.com/8a03a09a02a04a06/Ninja-Cowboy-Bear-Presents-the-Way-of-the-Ninja-by-David-Bruins.pdf
    • http://muicuiu.dumb1.com/1a00a09a07a04a01a07/Fiscal-Policy-Formulation-and-Implementation-in-Oil-Producing-Countries-by-Jeffrey-M-Davis.pdf
    • http://muicuiu.dumb1.com/2a03a04a01a02a05/The-Invasion-of-Adam-Tork-and-Adam-2-by-Claire-Davis.pdf
    • http://muicuiu.dumb1.com/2a02a03a08a08a03/The-Invasion-of-Tork-Tork-and-Adam-1-by-Claire-Davis.pdf
    • http://muicuiu.dumb1.com/3a06a06a08a09a09/Invasion-The-German-Invasion-of-England-July-1940-by-Kenneth-John-Macksey.pdf
    • http://muicuiu.dumb1.com/4a01a07a08a07a07/Invasion-Magic-The-Gathering-Invasion-Cycle-1-by-J-Robert-King.pdf
    • http://muicuiu.dumb1.com/4a02a05a05a05a04/Invasion-New-York-Invasion-America-4-by-Vaughn-Heppner.pdf
    • http://muicuiu.dumb1.com/4a02a05a05a04a08/Invasion-China-Invasion-America-5-by-Vaughn-Heppner.pdf
    • http://muicuiu.dumb1.com/1a00a08a02a03a00a00/Invasion-Colorado-Invasion-America-3-by-Vaughn-Heppner.pdf
    • http://muicuiu.dumb1.com/3a05a07a02a02a03/Invasion-Alien-Invasion-1-by-Sean-Platt.pdf
    • http://muicuiu.dumb1.com/6a06a01a03a01a02/Invasion-Alien-Invasion-1-by-Sean-Platt.pdf
    • http://muicuiu.dumb1.com/4a01a05a09a04a04/The-Totally-Ninja-Raccoons-and-the-Secret-of-Nessmuk-Lake-Totally-Ninja-Raccoons-6-by-Kevin-Coolidge.pdf
    • http://muicuiu.dumb1.com/3a07a05a02a04a04/Stay-At-Home-Dead-Stay-At-Home-Dad-Mysteries-1-by-Jeffrey-Allen.pdf
    • http://muicuiu.dumb1.com/4a03a04a09a09a02/Stay-At-Home-Dead-Stay-At-Home-Dad-Mystery-1-by-Jeffrey-Allen.pdf

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