Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c3b1ff89608b31…

MALICIOUS

PDF

15.9 KB Created: 2019-05-03 05:03:36 +01:00 Authoring application: mPDF 5.7
MD5: a473bc83b802f725ceaec871c87cc170 SHA-1: 4e6892b7a4b44d5200cb2a5811ee43e89513276b SHA-256: 70c3b1ff89608b31b36c3cc03e4036c6c369eecf0ba91c3e03dd8272d73af00e
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While the document body is heavily corrupted, the presence of numerous links suggests an attempt to direct users to a collection of external resources, possibly for SEO manipulation or to host malicious content. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

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/3a02a07a03a00a08/Space-Shuttles-Isaac-Asimov-s-Wonderful-Worlds-of-Science-Fiction-7-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/7a08a01a03a09a08/The-Best-Science-Fiction-of-Isaac-Asimov-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/1a01a06a03a03a07a09/Isaac-Asimov-Presents-the-Great-SF-Stories-8-1946-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/2a04a05a09a08/Isaac-Asimov-The-Foundations-of-Science-Fiction-by-James-E-Gunn.pdf
    • http://muicuiu.dumb1.com/2a06a06a05a00/Before-the-Golden-Age-A-Science-Fiction-Anthology-of-the-1930s-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/1a06a04a00a01a09/100-Great-Science-Fiction-Short-Short-Stories-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/1a06a03a09a02a07/Microcosmic-Tales-100-Wondrous-Science-Fiction-Short-Short-Stories-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/9a04a05a07a05a07/Best-of-Asimov-Die-besten-Geschichten-des-ber-hmten-Autors-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/7a08a01a03a01a06/Asimov-s-Chronology-of-the-World-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/2a04a08a09a04/Asimov-s-Science-Fiction-February-1999-Asimov-s-Science-Fiction-277-by-Gardner-Dozois.pdf
    • http://muicuiu.dumb1.com/1a03a09a00a03a03/David-Starr-Space-Ranger-Lucky-Starr-1-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/3a02a08a01a00a04/Nightfall-Two-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/1a07a02a01a08a03/The-Positronic-Man-by-Isaac-Asimov.pdf
    • http://muicuiu.dumb1.com/4a08a05a09a02a02/Azazel-by-Isaac-Asimov.pdf

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