Malicious PDF — malware analysis report

Static analysis result for SHA-256 57743fd3464f6423…

MALICIOUS

PDF

14.4 KB Created: 2019-04-30 05:20:33 +01:00 Authoring application: mPDF 5.7
MD5: 94d5884c07a316baa04ad2cf6317d0d5 SHA-1: 6954f58295e4f258637057ef316bb12f03652bef SHA-256: 57743fd3464f642399ddb1fcc0b5ff3a2e74266d11586bf28a161150ac8c6485
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 malicious intent to distribute content or manipulate search engine results. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification. While the document body is heavily corrupted, the presence of numerous links to external PDFs, such as http://muicuiu.dumb1.com/9a04a05a07a05a07/Best-of-Asimov-Die-besten-Geschichten-des-ber-hmten-Autors-by-Isaac-Asimov.pdf, indicates a likely distribution or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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/9a04a05a07a05a07/Best-of-Asimov-Die-besten-Geschichten-des-ber-hmten-Autors-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/3a02a07a03a00a08/Space-Shuttles-Isaac-Asimov-s-Wonderful-Worlds-of-Science-Fiction-7-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/1a01a06a03a03a07a09/Isaac-Asimov-Presents-the-Great-SF-Stories-8-1946-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/6a09a04a06a03a06/Isaac-Asimov-s-Guide-to-Earth-and-Space-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/7a08a01a03a01a06/Asimov-s-Chronology-of-the-World-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/7a08a01a03a09a08/The-Best-Science-Fiction-of-Isaac-Asimov-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/1a02a09a07a06a05/Isaac-Asimov-s-Caliban-Isaac-Asimov-s-Caliban-1-by-Roger-MacBride-Allen.pdf
    • http://muicuiu.dumb1.com/1a06a04a01a04a04/Gimmicks-Three-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/2a05a01a05a03a03/The-Gods-Themselves-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/2a04a04a03a08/Robbie-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/4a08a03a06a03a03/Faeries-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/2a04a06a01a07/The-Bicentennial-Man-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/4a07a06a05a03/The-Ugly-Little-Boy-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/7a08a01a03a04a00/Youth-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/6a04a06a07a03a09/Foundation-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/3a03a04a01a06a09/Second-Foundation-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/1a07a02a01a08a03/The-Positronic-Man-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/4a08a05a09a02a02/Azazel-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/3a02a08a01a00a04/Nightfall-Two-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/4a04a02a03a04a05/The-Gods-Themselves-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/2a04a04a03a08/Robbie-by-Isaac-Asim

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