Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d8af5db7cd7b85…

MALICIOUS

PDF

15.6 KB Created: 2019-04-30 06:24:22 +01:00 Authoring application: mPDF 5.7
MD5: 511c73bf61c36191fa606f70b68525eb SHA-1: 55bd688782bd813879a5f68534567511dfaa2c2d SHA-256: 45d8af5db7cd7b8535a6ca5fc0355de5e9ba1146982985f17978d205dea52455
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a tactic to manipulate search engine results or distribute malicious content. While the specific URLs are marked as benign, the sheer volume and the ML classifier's high confidence indicate a malicious intent. No scripts were extracted from this sample, and the document body was unreadable.

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/9a07a06a07a05a05/Crossed-Genres-Quarterly-3-by-Bart-R-Leib.pdf
    • http://muicuiu.dumb1.com/5a03a07a04a02a01/Crossed-Genres-Quarterly-4-by-Bart-R-Leib.pdf
    • http://muicuiu.dumb1.com/5a03a07a04a03a05/Crossed-Genres-Issue-1-by-Bart-R-Leib.pdf
    • http://muicuiu.dumb1.com/9a07a06a08a06a08/Crossed-Genres-Magazine-2-0-Book-Two-by-Bart-R-Leib.pdf
    • http://muicuiu.dumb1.com/9a07a06a07a06a02/Crossed-Genres-Issue-12-Lesbian-Gay-Bisexual-Transgendered-amp-Queer-by-Bart-R-Leib.pdf
    • http://muicuiu.dumb1.com/3a06a09a00a05a02/Fierce-Family-by-Bart-R-Leib.pdf
    • http://muicuiu.dumb1.com/2a02a07a05a03a04/Crossed-One-Hundred-Crossed-100-1-by-Alan-Moore.pdf
    • http://muicuiu.dumb1.com/1a08a04a03a01a03/Bart-Simpson-s-Treehouse-of-Horror-Heebie-Jeebie-Hullabaloo-Bart-Simpson-s-Treehouse-of-Horror-1-by-Matt-Groening.pdf
    • http://muicuiu.dumb1.com/8a03a09a07a06a07/Grantland-Quarterly-no-7-by-Bill-Simmons.pdf
    • http://muicuiu.dumb1.com/5a03a07a04a03a01/Folklore-Genres-by-Dan-Ben-Amos.pdf
    • http://muicuiu.dumb1.com/3a07a03a00a03a01/The-Negative-s-Tale-by-R-Leib.pdf
    • http://muicuiu.dumb1.com/4a03a09a09a05a06/Vertigo-Quarterly-CMYK-3-Yellow-by-F-bio-Moon.pdf
    • http://muicuiu.dumb1.com/1a01a04a01a04a00a05/Us-and-Them-On-the-Importance-of-Animals-Quarterly-Essay-45-by-Anna-Krien.pdf
    • http://muicuiu.dumb1.com/7a02a02a02a01a08/Postmodern-Genres-by-Marjorie-Perloff.pdf
    • http://muicuiu.dumb1.com/3a09a03a05a02a06/SmokeLong-Quarterly-The-Best-of-the-First-Ten-Years-2003-2013-by-Tara-Laskowski.pdf
    • http://muicuiu.dumb1.com/9a07a06a06a07a09/Valley-of-the-Shadow-by-Franklin-Allen-Leib.pdf
    • http://muicuiu.dumb1.com/9a07a06a06a01a08/Fire-Arrow-by-Franklin-Allen-Leib.pdf
    • http://muicuiu.dumb1.com/9a07a06a06a08a01/Ohne-Leib-mit-Seele-by-Georg-Fraberger.pdf
    • http://muicuiu.dumb1.com/1a08a07a06a04a06/The-Fire-Dream-by-Franklin-Allen-Leib.pdf
    • http://muicuiu.dumb1.com/9a07a06a07a05a06/The-House-of-Pain-by-Franklin-Allen-Leib.pdf
    • http://muicuiu.dumb1.com/1a08a04a03a01a03/Bart-Simpson-s-Treehouse-of-Horror-Heebie-Jeebie-Hullabaloo-Bart-Simpson-s-Treehouse-of-Horror-1-

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