Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c388726f6773ef0…

MALICIOUS

PDF

21.1 KB Created: 2019-04-30 08:37:09 +01:00 Authoring application: mPDF 5.7
MD5: 105ba62211c2c1907c8214a3503ecc54 SHA-1: 219054b3c37bd7b515cea1627f087bfc6465851d SHA-256: 4c388726f6773ef0d6921bc99f7fe577784d3c34f68699d1e664fa7b2325e8be
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

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. While the specific URLs appear benign, the overall structure and heuristic firings suggest an attempt to direct users to potentially harmful content, possibly as a lure or to bypass initial security checks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/3a01a08a04a04a07/Uncle-John-s-Bathroom-Reader-Cat-Lover-s-Companion-by-Bathroom-Readers-39-Institute.pdf
    • http://muicuiu.dumb1.com/4a03a01a04a07a09/Uncle-John-s-Supremely-Satisfying-Bathroom-Reader-Uncle-John-s-Bathroom-Reader-14-by-Bathroom-Readers-39-Institute.pdf
    • http://muicuiu.dumb1.com/4a02a02a04a00/There-s-a-Boy-in-the-Girls-Bathroom-by-Louis-Sachar.pdf
    • http://muicuiu.dumb1.com/3a02a08a09a01a04/The-Bathroom-by-Jean-Philippe-Toussaint.pdf
    • http://muicuiu.dumb1.com/1a03a05a04a02a07/Bunnies-in-the-Bathroom-Animal-Ark-15-by-Ben-M-Baglio.pdf
    • http://muicuiu.dumb1.com/2a08a03a02a00a06/As-Long-as-I-Have-My-Own-Bathroom-by-Heather-Jonasson.pdf
    • http://muicuiu.dumb1.com/8a07a05a07a01/There-s-A-Boy-in-the-Girls-Bathroom-by-Louis-Sachar.pdf
    • http://muicuiu.dumb1.com/6a00a02a09/Words-on-Bathroom-Walls-by-Julia-Walton.pdf
    • http://muicuiu.dumb1.com/4a02a06a08a02a07/The-Baseball-Buff-s-Bathroom-Book-by-Carl-H-Johnson.pdf
    • http://muicuiu.dumb1.com/6a05a08a03a06a05/The-monster-in-the-bathroom-Guardian-Fairy-Book-3-by-Anastasia-Ducret.pdf
    • http://muicuiu.dumb1.com/4a02a06a08a01a05/The-Baseball-Buff-s-Bathroom-Book-Volume-II-by-Carl-H-Johnson.pdf
    • http://muicuiu.dumb1.com/1a03a03a03a01a08/An-Alligator-in-the-Bathroom-And-Other-Stories-Memoirs-of-an-RSPCA-Inspector-in-Yorkshire-by-Carter-Langdale.pdf
    • http://muicuiu.dumb1.com/1a00a02a09a04a02a07/Toilet-Tales-Hilarious-Embarrassing-True-Stories-of-Bathroom-Humor-by-Ryan-Jacobson.pdf
    • http://muicuiu.dumb1.com/4a09a09a09a06a01/-quot-You-re-in-the-Wrong-Bathroom-quot-And-20-Other-Myths-and-Misconceptions-about-Transgender-and-Gender-Nonconforming-People-by-Laura-Erickson-Schroth.pdf
    • http://muicuiu.dumb1.com/5a04a03a02a00/Judging-a-Book-by-Its-Lover-A-Field-Guide-to-the-Hearts-and-Minds-of-Readers-Everywhere-by-Lauren-Leto.pdf
    • http://muicuiu.dumb1.com/8a01a08a07a00a07/The-Prince-and-the-Pauper-Mandarin-Companion-Graded-Readers-Level-1-Simplified-Character-Edition-by-Mark-Twain.pdf
    • http://muicuiu.dumb1.com/1a00a00a05a02a05a06/The-New-Wine-Lover-s-Companion-by-Sharon-Tyler-Herbst.pdf
    • http://muicuiu.dumb1.com/3a00a09a07a00a03/The-New-Food-Lover-s-Companion-by-Sharon-Tyler-Herbst.pdf
    • http://muicuiu.dumb1.com/8a06a01a04a02a03/A-Tale-of-Two-Cities-A-Reader-s-Companion-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/1a02a09a07a02a07/The-Lord-of-the-Rings-A-Reader-s-Companion-by-Wayne-G-Hammond.pdf
    • http://muicuiu.dumb1.com/6a00a0

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