Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa9bb686ed76489…

MALICIOUS

PDF

19.5 KB Created: 2019-04-30 05:10:45 +01:00 Authoring application: mPDF 5.7
MD5: 44c50beed503dbfd5201931679d6a9c5 SHA-1: 1696a4de39062ac7910d37877bdc9baaf4d7b595 SHA-256: 1aa9bb686ed764897ae38ca71969b1e42c6ee3c8a77fd875f859336d65470f52
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded URLs, identified as a link farm. While most of these URLs were classified as benign, the sheer volume and the heuristic firing of 'PDF_SEO_LINK_FARM' suggest a malicious intent, possibly for SEO manipulation or to redirect users to malicious content. The ML classifier also flagged the PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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/3a03a05a08a04a06/The-Second-Lady-by-Irving-Wallace.pdf
    • http://muicuiu.dumb1.com/1a00a07a06a07a09a02/The-Fan-Club-by-Irving-Wallace.pdf
    • http://muicuiu.dumb1.com/1a00a07a06a07a09a04/The-Almighty-by-Irving-Wallace.pdf
    • http://muicuiu.dumb1.com/4a05a03a05a02/The-Prize-by-Irving-Wallace.pdf
    • http://muicuiu.dumb1.com/1a03a07a00a06a08/The-Word-by-Irving-Wallace.pdf
    • http://muicuiu.dumb1.com/7a03a07a03a07/The-Seven-Minutes-by-Irving-Wallace.pdf
    • http://muicuiu.dumb1.com/1a08a04a03a02a02/Secret-in-St-Something-by-Barbara-Brooks-Wallace.pdf
    • http://muicuiu.dumb1.com/6a04a09a05a06a03/BEN-HUR-LEW-WALLACE-LARGE-14-Point-Font-Print-A-Tale-of-the-Christ-by-Lew-Wallace.pdf
    • http://muicuiu.dumb1.com/2a07a01a08a02a02/Washington-Irving-A-Treasury-Rip-Van-Winkle-The-Legend-of-Sleepy-Hollow-Old-Christmas-by-Washington-Irving.pdf
    • http://muicuiu.dumb1.com/4a07a04a05a05a04/Moonlight-Murder-The-Last-Poetic-Prose-of-D-B-Wallace-by-D-B-Wallace.pdf
    • http://muicuiu.dumb1.com/8a05a02a08a02a00/The-Seventh-Day-The-Seventh-Day-1-by-A-E-Watson.pdf
    • http://muicuiu.dumb1.com/1a00a07a06a06a09a04/Irving-Wishbutton-and-the-Questing-Academy-Irving-Wishbutton-1-by-Brian-Clopper.pdf
    • http://muicuiu.dumb1.com/7a07a00a00a05a02/BEN-HUR-THE-FAIR-GOD-amp-THE-PRINCE-OF-INDIA-or-Why-Constantinople-Fell-LEW-WALLACE-PREMIUM-COLLECTION-Timeless-Wisdom-Collection-Book-1825-by-Lew-Wallace.pdf
    • http://muicuiu.dumb1.com/1a01a06a01a00a06a02/The-Science-of-Getting-Rich-Paperback-Jan-01-2007-Wattles-Wallace-D-by-Wallace-D-Wattles.pdf
    • http://muicuiu.dumb1.com/1a09a01a05a02a04/Space-Station-Seventh-Grade-Space-Station-Seventh-Grade-1-by-Jerry-Spinelli.pdf
    • http://muicuiu.dumb1.com/3a03a05a06/String-Theory-David-Foster-Wallace-on-Tennis-by-David-Foster-Wallace.pdf
    • http://muicuiu.dumb1.com/8a07a09a02a05a09/CPT-and-Lorentz-Symmetry-Proceedings-of-the-Seventh-Meeting-on-CPT-and-Lorentz-Symmetry-Seventh-Meeting-on-CPT-and-Lorentz-Symmetry-by-V-Alan-Kostelecky.pdf
    • http://muicuiu.dumb1.com/3a09a03a02a08a04/Letters-of-Wallace-Stevens-by-Wallace-Stevens.pdf
    • http://muicuiu.dumb1.com/3a01a07a04a05a07/The-Seventh-Bride-by-T-Kingfisher.pdf
    • http://muicuiu.dumb1.com/2a09a00a07a06a04/The-Seventh-Bride-by-T-Kingfisher.pdf

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