Malicious PDF — malware analysis report

Static analysis result for SHA-256 6decb2ffae62e1d8…

MALICIOUS

PDF

18.0 KB Created: 2019-05-05 16:07:07 +01:00 Authoring application: mPDF 5.7
MD5: 7c6290f6cc8c908ac9535e976ae7bd8f SHA-1: fd0671b2e8beeb56c4c4dc7a462a14eca58d40cc SHA-256: 6decb2ffae62e1d821b2ee5f5d76813f6f6aa833ec1ca074fa0d54c44b1af560
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, masquerading as book downloads, which is indicative of a link farm or redirection to malicious sites. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous links and the 'SE_DOWNLOAD_BUTTON' heuristic suggest a social engineering tactic to trick users into navigating to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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/5a06a01a07a00a03/Sense-and-Sensibility-Illustrated-and-Annotated-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/5a09a03a03a08a02/Sense-and-Sensibility-By-Jane-Austen-Illustrated-amp-Unabridged-Free-Bonus-Audiobook-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/1a01a07a07a01a00a03/Four-Major-Works-by-Jane-Austen-Northanger-Abbey-Lady-Susan-Sense-and-Sensibility-Pride-and-Prejudice-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/1a01a07a06a09a03a01/The-Complete-Works-of-Jane-Austen-In-One-Volume-Sense-and-Sensibility-Pride-and-Prejudice-Mansfield-Park-Emma-Northanger-Abbey-Persuasion-Lady-Sandition-and-the-Complete-Juvenilia-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/5a03a01a09a06a00/Sense-and-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/7a03a07a03a08a09/Sense-and-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/7a00a09a00a09a08/Sense-and-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/6a04a05a01a01a06/Sense-amp-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/7a06a02a02a06a05/Sense-and-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/5a07a02a03a07a01/Sense-and-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/9a01a09a05a02a00/Sense-and-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/5a08a00a01a00a03/Sense-and-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/7a03a06a03a03a05/Sense-and-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/3a00a02a00a09a08/Sense-and-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/4a05a02a08a05a09/Sense-amp-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/9a01a06a02a06a02/Sense-and-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/1a08a04a00a00a04/Sense-and-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/7a02a00a03a08a09/Sense-and-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/3a07a07a07a02a06/Sense-and-Sensibility-by-Jane-Austen.pdf
    • http://muicuiu.dumb1.com/7a02a01a04a03a07/Sense-and-Sensibility-by-Jane-Austen.pdf

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