Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf520091893e0ec…

MALICIOUS

PDF

20.9 KB Created: 2019-05-02 01:07:35 +01:00 Authoring application: mPDF 5.7
MD5: cf25d3cf2aab448490c8e8e68b7e5b44 SHA-1: 7e959987a38532ab357aa0c9fb55d14ece852a91 SHA-256: ebf520091893e0ece71d19ee96c36c309ab86902314303da7f1866417f70aade
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO poisoning attack. While the ML classifier strongly indicates maliciousness, the specific intent beyond link manipulation is unclear as no executable scripts or malicious document body content were extracted. The numerous URLs are the primary IOCs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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/3a05a03a00a05a07/Unquiet-Earth-An-Anthology-of-Living-Dead-Flash-Fiction-by-Chris-Bartholomew.pdf
    • http://muicuiu.dumb1.com/3a09a04a02a03a05/Flash-Fiction-40-The-July-2009-Anthology-by-Maria-Schneider.pdf
    • http://muicuiu.dumb1.com/4a03a09a01a03a04/Tales-by-the-Tree-An-Anthology-of-Holiday-Flash-Fiction-by-Laura-Jamez.pdf
    • http://muicuiu.dumb1.com/1a01a07a00a00a04a02/Necon-E-Books-Flash-Fiction-Anthology-Best-of-2011-by-Matt-Bechtel.pdf
    • http://muicuiu.dumb1.com/2a00a01a05a07a03/Possibilities-A-State-of-Black-SF-Flash-Fiction-Anthology-by-Alicia-McCalla.pdf
    • http://muicuiu.dumb1.com/1a01a07a00a01a04a03/Necon-E-Books-Best-of-2013-Flash-Fiction-Anthology-by-Matt-Bechtel.pdf
    • http://muicuiu.dumb1.com/4a04a04a07a02a03/Daily-Flash-2012-366-Days-of-Flash-Fiction-by-Jessy-Marie-Roberts.pdf
    • http://muicuiu.dumb1.com/2a06a05a00a07a09/Espresso-Fiction-A-Collection-of-Flash-Fiction-for-the-Average-Joe-by-Kaj-Anderson-Bauer.pdf
    • http://muicuiu.dumb1.com/8a08a09a03a07a02/35-Tips-for-Writing-a-Brilliant-Flash-Story-A-Manual-for-Writing-Flash-Fiction-and-Nonfiction-by-Kaye-Linden.pdf
    • http://muicuiu.dumb1.com/1a01a06a00a01a07a01/The-Morgue-An-Anthology-by-Jon-Bartholomew.pdf
    • http://muicuiu.dumb1.com/2a06a00a08a01/The-Living-Dead-The-Living-Dead-1-by-John-Joseph-Adams.pdf
    • http://muicuiu.dumb1.com/7a02a03a07a08a05/Static-Movement-Print-Special-No-2-by-Chris-Bartholomew.pdf
    • http://muicuiu.dumb1.com/3a03a09a00a02a00/The-Unquiet-Dead-Rachel-Getty-amp-Esa-Khattak-1-by-Ausma-Zehanat-Khan.pdf
    • http://muicuiu.dumb1.com/6a00a03a05a04a08/Fiction-River-Justice-Fiction-River-An-Original-Anthology-Magazine-Book-27-by-Fiction-River.pdf
    • http://muicuiu.dumb1.com/9a05a08a05a06a07/The-Day-Dali-Died-Poetry-and-Flash-Fiction-by-Jeff-VanderMeer.pdf
    • http://muicuiu.dumb1.com/1a00a06a05a02a06a02/Mixed-Up-Cocktail-Recipes-and-Flash-Fiction-for-the-Discerning-Drinker-by-Nick-Mamatas.pdf
    • http://muicuiu.dumb1.com/7a03a04a05a04a01/Bartholomew-Peloponnese-and-Cyclades-Holiday-Map-by-Bartholomew.pdf
    • http://muicuiu.dumb1.com/4a04a04a06a00a00/Daily-Frights-2012-366-Days-of-Dark-Flash-Fiction-by-Jessy-Marie-Roberts.pdf
    • http://muicuiu.dumb1.com/4a04a01a01a07a07/Living-with-the-Dead-Twenty-Years-on-the-Bus-with-Garcia-and-the-Grateful-Dead-by-Rock-Scully.pdf
    • http://muicuiu.dumb1.com/1a01a03a00a08a08a04/Ramblings-of-a-reckless-man-By-Mario-L-Hicks-Flash-fiction-and-short-stories-Book-1-by-Pedro-Jaun.pdf
    • http://muicuiu.dumb1.com/2a06a05a00a07a09/Espresso-Fiction-A-Collection-of-Flash-Fiction-for-the-Average-Joe-by-Kaj-Anders

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