Malicious PDF — malware analysis report

Static analysis result for SHA-256 164f5e1d60b655d2…

MALICIOUS

PDF

15.4 KB Created: 2019-04-30 05:40:24 +01:00 Authoring application: mPDF 5.7
MD5: 77ff87ad368336c99121fbaf6e23541c SHA-1: 25ad252554d9ca3cc59df681edaf7daaa9f47b0b SHA-256: 164f5e1d60b655d2e856c6d0c86a831e4ccf79d2828e322e44062823215c2915
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, identified as a link farm. While the document body is heavily obfuscated, the presence of numerous links and a critical heuristic firing for PDF_SEO_LINK_FARM suggests an attempt to manipulate search engine results or distribute content through a link farm. The ML classifier also flagged the document as malicious, increasing confidence in this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

Heuristics 3

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/2a08a06a09a00a03/Shelton-in-Love-Shelton-1-by-Dianne-Hartsock.pdf
    • http://muicuiu.dumb1.com/7a09a09a05a07a01/Wayne-Shelton---Volume-5---The-Vengeance-Wayne-Shelton-by-Cailleteau.pdf
    • http://muicuiu.dumb1.com/1a00a08a00a06a04/The-Mentor-by-Ryan-M-Shelton.pdf
    • http://muicuiu.dumb1.com/1a00a01a03a03a03a01/Clockwork-by-Paige-Shelton.pdf
    • http://muicuiu.dumb1.com/1a01a00a00a06a06/The-Captain-by-Ryan-M-Shelton.pdf
    • http://muicuiu.dumb1.com/4a07a06a08a06a00/Risk-of-a-Lifetime-by-Claudia-Shelton.pdf
    • http://muicuiu.dumb1.com/4a09a00a09a09a01/The-Cracked-Spine-by-Paige-Shelton.pdf
    • http://muicuiu.dumb1.com/4a02a01a03a08a08/The-Book-Case-by-Dave-Shelton.pdf
    • http://muicuiu.dumb1.com/1a01a02a08a06a09a03/Christmas-Blood-by-Maxi-Shelton.pdf
    • http://muicuiu.dumb1.com/4a06a00a05a06a08/A-Boy-and-A-Bear-in-a-Boat-by-Dave-Shelton.pdf
    • http://muicuiu.dumb1.com/8a02a01a06a06a04/Principles-of-Natural-Hygiene-by-Herbert-M-Shelton.pdf
    • http://muicuiu.dumb1.com/1a00a01a06a07a03a07/Sleepless-Insomnia-amp-Natural-Remedies-by-C-D-Shelton.pdf
    • http://muicuiu.dumb1.com/7a01a03a02a04a07/Psalms-in-the-Key-of-My-life-by-Carol-Shelton-Moye.pdf
    • http://muicuiu.dumb1.com/9a00a03a05a07a08/Deadly-Gamble-Charlie-Parker-1-by-Connie-Shelton.pdf
    • http://muicuiu.dumb1.com/1a03a04a09a01a01/Deadly-Gamble-Charlie-Parker-1-by-Connie-Shelton.pdf
    • http://muicuiu.dumb1.com/4a03a04a09a09a00/Deadly-Gamble-Charlie-Parker-1-by-Connie-Shelton.pdf
    • http://muicuiu.dumb1.com/6a04a08a00a07a00/Hesitation-Kills-The-Vipers-Soccer-Chronicles-by-Gilbert-Shelton.pdf
    • http://muicuiu.dumb1.com/4a06a08a07a03a01/The-fabulous-furry-Freak-Brothers---Collection-Two-by-Gilbert-Shelton.pdf
    • http://muicuiu.dumb1.com/8a04a06a00a00a03/The-Second-Angela-Brazil-s-Collected-Works-The-Princess-of-the-School-A-Fortunate-Term-and-More-12-Works-The-Schoolgirl-s-Sories-by-Angela-Brazil.pdf
    • http://muicuiu.dumb1.com/7a01a03a02a04a04/Unfailing-Love-Psalms-in-the-Key-of-my-Life-Volume-II-by-Carol-Shelton-Moye.pdf

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