Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41a92151492ccbb…

MALICIOUS

PDF

17.0 KB Created: 2019-05-03 05:09:06 +01:00 Authoring application: mPDF 5.7
MD5: f9e64ad48e51b47e6d9e4b856cd6c5be SHA-1: 77fb90daddc90ab53f1f0466fc3ed18c7a3ada3d SHA-256: d41a92151492ccbbba0b81669bf43c2a5aea841dcf42fcaf199dfae73fd57454
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, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier strongly indicated maliciousness. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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.dum
    • http://muicuiu.dumb1.com/8a04a09a05a01a04/Winter-Solstice-Winter-Viking-Blood-Saga-1-by-E-J-Squires.pdf
    • http://muicuiu.dumb1.com/1a05a05a07a02a07/Winter-s-Storm-Retribution-Winter-s-Saga-2-by-Karen-Luellen.pdf
    • http://muicuiu.dumb1.com/2a02a00a02a07a06/Winter-s-Scars-The-Forsaken-Winter-s-Saga-5-by-Karen-Luellen.pdf
    • http://muicuiu.dumb1.com/1a05a05a07a00a09/Winter-s-Wrath-Sacrifice-Winter-s-Saga-3-by-Karen-Luellen.pdf
    • http://muicuiu.dumb1.com/2a04a09a03a03/Winter-Solstice-by-Mike-Resnick.pdf
    • http://muicuiu.dumb1.com/2a06a05a02a05a00/Winter-Solstice-by-Elin-Hilderbrand.pdf
    • http://muicuiu.dumb1.com/3a09a04a05a07a04/Solstice-Wood-Winter-Rose-2-by-Patricia-A-McKillip.pdf
    • http://muicuiu.dumb1.com/1a01a08a08a04a02a08/Wolf-s-Holiday-Winter-Solstice-Run-1-Black-Hills-Wolves-31-by-Rebecca-Royce.pdf
    • http://muicuiu.dumb1.com/3a06a09a09a02a02/Fires-of-Winter-Viking-1-by-Johanna-Lindsey.pdf
    • http://muicuiu.dumb1.com/4a01a00a04a02a02/Fires-of-Winter-Viking-1-by-Johanna-Lindsey.pdf
    • http://muicuiu.dumb1.com/9a09a02a09a02a05/Another-Day-in-Winter-NEW-from-the-No1-Bestselling-Author-A-perfect-winter-treat-A-Winter-Day-Book-Book-2-by-Shari-Low.pdf
    • http://muicuiu.dumb1.com/3a06a05a04a09a00/Call-of-Winter-Winter-Princess-Serial-1-by-Skye-MacKinnon.pdf
    • http://muicuiu.dumb1.com/4a02a03a03a02a07/One-Christmas-In-Winter-Winter-Montana-1-by-Bell-Renshaw.pdf
    • http://muicuiu.dumb1.com/3a00a06a08a01a02/Red-Winter-Red-Winter-Trilogy-1-by-Annette-Marie.pdf
    • http://muicuiu.dumb1.com/2a01a02a08a04a05/Winter-in-the-Blood-by-James-Welch.pdf
    • http://muicuiu.dumb1.com/5a08a09a00a03a00/The-Winter-Wolf-The-Serahpim-Saga-Volume-2-by-S-M-Carri-re.pdf
    • http://muicuiu.dumb1.com/3a03a05a07a06a03/Finally-Winter-Renegade-Souls-MC-Romance-Saga-5-by-V-Theia.pdf
    • http://muicuiu.dumb1.com/5a02a08a01/The-Marvelous-Misadventures-of-Ingrid-Winter-Ingrid-Winter-Misadventure-1-by-J-S-Drangsholt.pdf
    • http://muicuiu.dumb1.com/2a09a03a00a04a04/Winter-Queen-The-Winter-Queen-1-by-Erica-Marie-Hogan.pdf
    • http://muicuiu.dumb1.com/2a05a09a00a06a06/Dark-Winter-Last-Rites-Dark-Winter-3-by-John-Hennessy.pdf

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