Malicious PDF — malware analysis report

Static analysis result for SHA-256 666642fa70be8a20…

MALICIOUS

PDF

15.8 KB Created: 2019-04-29 23:28:07 +01:00 Authoring application: mPDF 5.7
MD5: 09dc8a2c0ebd2a32b212e5d58cfb238c SHA-1: d09ec4ae346612bce5f22b00aad49871d64f075e SHA-256: 666642fa70be8a20cc421ffeb845ee807318e3c04309dcadc50ff1aaf90ed22f
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified as a link farm, suggesting a malicious intent to redirect users. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the link farm heuristic strongly indicate a social engineering attack, likely spearphishing, aiming to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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/1a06a07a08a02a03/A-Torch-Against-the-Night-An-Ember-in-the-Ashes-2-by-Sabaa-Tahir.pdf
    • http://muicuiu.dumb1.com/3a07a08a03/A-Torch-Against-the-Night-An-Ember-in-the-Ashes-2-by-Sabaa-Tahir.pdf
    • http://muicuiu.dumb1.com/6a03a01a00/A-Torch-Against-the-Night-An-Ember-in-the-Ashes-2-by-Sabaa-Tahir.pdf
    • http://muicuiu.dumb1.com/1a01a05a09a08a06/A-Torch-Against-the-Night-An-Ember-in-the-Ashes-2-by-Sabaa-Tahir.pdf
    • http://muicuiu.dumb1.com/2a04a08a05a00a06/A-Torch-Against-the-Night-An-Ember-in-the-Ashes-2-by-Sabaa-Tahir.pdf
    • http://muicuiu.dumb1.com/2a01a04a03a05a05/Untitled-An-Ember-in-the-Ashes-4-by-Sabaa-Tahir.pdf
    • http://muicuiu.dumb1.com/3a05a03a03a01a00/SNEAK-PEEK-An-Ember-in-the-Ashes-by-Sabaa-Tahir.pdf
    • http://muicuiu.dumb1.com/6a00a00/An-Ember-in-the-Ashes-An-Ember-in-the-Ashes-1-by-Sabaa-Tahir.pdf
    • http://muicuiu.dumb1.com/4a08a02a07a08/An-Ember-in-the-Ashes-An-Ember-in-the-Ashes-1-by-Sabaa-Tahir.pdf
    • http://muicuiu.dumb1.com/3a00a06a04a06a05/An-Ember-in-the-Ashes-An-Ember-in-the-Ashes-1-by-Sabaa-Tahir.pdf
    • http://muicuiu.dumb1.com/2a05a08a03/An-Ember-in-the-Ashes-An-Ember-in-the-Ashes-1-by-Sabaa-Tahir.pdf
    • http://muicuiu.dumb1.com/1a02a09a06a03a05/An-Ember-in-the-Ashes-An-Ember-in-the-Ashes-1-by-Sabaa-Tahir.pdf
    • http://muicuiu.dumb1.com/8a09a05a06a07a06/The-Tiger-s-Watch-Ashes-of-Gold-1-by-Julia-Ember.pdf
    • http://muicuiu.dumb1.com/2a05a02a08a04a06/The-Circle-of-Fire-In-the-Midst-of-the-Ashes-an-Ember-of-Hope-Flickered-by-Justina-R-Page.pdf
    • http://muicuiu.dumb1.com/2a01a09a06a09a02/The-City-of-Ember-The-Ember-Series-1-by-Jeanne-DuPrau.pdf
    • http://muicuiu.dumb1.com/8a04a05a02a01a00/The-Rubaiyat-of-Baba-Tahir-Oryan-of-Hamadan-by-Baba-Tahir.pdf
    • http://muicuiu.dumb1.com/1a01a04a07a06a02a07/Ember-Rising-The-Green-Ember-3-by-S-D-Smith.pdf
    • http://muicuiu.dumb1.com/4a07a01a05a04a06/Ember---Part-Three-Ember-3-by-Deborah-Bladon.pdf
    • http://muicuiu.dumb1.com/4a08a09a01a04a02/Ember-Falls-The-Green-Ember-2-by-S-D-Smith.pdf
    • http://muicuiu.dumb1.com/4a00a00a05/Frost-Like-Night-Snow-Like-Ashes-3-by-Sara-Raasch.pdf

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