Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c55391865832a27…

MALICIOUS

PDF

15.5 KB Created: 2019-04-30 05:51:41 +01:00 Authoring application: mPDF 5.7
MD5: 241dcb3adde1f7a4c754c58ad521ec93 SHA-1: 3c2c76c58d1d0e3a47866d39291bfe8e60bc2afa SHA-256: 8c55391865832a2735608ae7c58fa68ea485e36209332e203fe220f251fd4ddf
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier also flagged this PDF as malicious. While the specific intent of the links is unclear due to their benign reputation, the sheer volume and the heuristic firing suggest a malicious purpose, likely related to driving traffic or distributing further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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/3a07a05a04a00a07/Last-Watch-the-Day-Watch-the-Twilight-Watch-the-Night-Watch-by-Sergei-Lukyanenko.pdf
    • http://muicuiu.dumb1.com/3a03a03a04a05/Night-Watch-Watch-1-by-Sergei-Lukyanenko.pdf
    • http://muicuiu.dumb1.com/1a09a03a08a04a09/The-Night-Watch-Watch-1-by-Sergei-Lukyanenko.pdf
    • http://muicuiu.dumb1.com/4a08a09a07a00a00/Night-Watch-Watch-1-by-Sergei-Lukyanenko.pdf
    • http://muicuiu.dumb1.com/2a08a08a01a09a00/Keeping-Watch-An-Erotic-Short-Inside-Job-1-by-Bebe-Haven.pdf
    • http://muicuiu.dumb1.com/3a09a09a06a08a07/Keeping-Her-Up-All-Night-by-Anna-Cleary.pdf
    • http://muicuiu.dumb1.com/2a02a08a01a08a06/Winds-of-Hope-Jason-Wolfe-3-by-Anita-Stansfield.pdf
    • http://muicuiu.dumb1.com/4a05a04a01a09a04/The-Night-Watch-Blood-Red-2-by-W-J-May.pdf
    • http://muicuiu.dumb1.com/3a05a07a09a06/The-Night-Watch-by-Sarah-Waters.pdf
    • http://muicuiu.dumb1.com/2a08a04a05a07a01/Night-Watch-by-Sergei-Lukyanenko.pdf
    • http://muicuiu.dumb1.com/1a00a08a07a03a07/Night-Watch-by-Fr-a-Sigur-ard-ttir.pdf
    • http://muicuiu.dumb1.com/3a00a08a04a02a00/Night-Watch-Discworld-29-by-Terry-Pratchett.pdf
    • http://muicuiu.dumb1.com/4a03a03a02a02a02/The-Watch-that-Ends-the-Night-by-Hugh-MacLennan.pdf
    • http://muicuiu.dumb1.com/2a08a08a04a07a05/Never-Cry-Wolf-Night-Watch-4-by-Cynthia-Eden.pdf
    • http://muicuiu.dumb1.com/4a04a09a03a06a08/Day-After-Night-by-Anita-Diamant.pdf
    • http://muicuiu.dumb1.com/4a06a05a02a05/Eternal-Flame-Night-Watch-3-by-Cynthia-Eden.pdf
    • http://muicuiu.dumb1.com/1a09a08a07a00/Last-Watch-of-the-Night-Essays-Too-Personal-and-Otherwise-by-Paul-Monette.pdf
    • http://muicuiu.dumb1.com/4a07a09a02a02a03/Ocean-Night-Hunt-Animals-at-Night-Book-2-by-N-V-Smith.pdf
    • http://muicuiu.dumb1.com/4a07a09a03a08a07/The-Night-Hunters-Animals-at-Night-Book-1-by-N-V-Smith.pdf
    • http://muicuiu.dumb1.com/4a04a05a01a05a01/The-Occupation-Trilogy-La-Place-de-l-toile-The-Night-Watch-Ring-Roads-by-Patrick-Modiano.pdf

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