Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c231b67eb5422f…

MALICIOUS

PDF

13.6 KB Created: 2019-05-07 05:25:30 +01:00 Authoring application: mPDF 5.7
MD5: 8805da7623729b999fb57ca0d9af768f SHA-1: 9ec2ddf823614ce4e1061637cff0d492919dbaac SHA-256: 88c231b67eb5422f57da45afb2fe3142006ecf93b7eeacc27403a4a8e4fcc458
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this document as malicious. While no scripts were extracted, the PDF structure and link farm heuristic strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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/2a07a02a00a06a03/Found-at-the-Library-Found-1-by-Christi-Snow.pdf
    • http://muicuiu.dumb1.com/2a02a09a02a09a05/Found-by-You-Found-by-You-1-by-Victoria-H-Smith.pdf
    • http://muicuiu.dumb1.com/4a08a03a00a06a09/He-Found-Me-He-Found-Me-1-by-Whitney-Barbetti.pdf
    • http://muicuiu.dumb1.com/4a05a03a03a02a03/Principia-Discordia-Or-quot-How-I-Found-Goddess-and-What-I-Did-to-Her-When-I-Found-Her-quot-by-Gregory-Hill.pdf
    • http://muicuiu.dumb1.com/3a09a05a01a08a09/Lost-and-Found-Pieces-Lost-and-Found-5-2-by-J-M-Madden.pdf
    • http://muicuiu.dumb1.com/7a05a07a07a04/Nowhere-to-Be-Found-by-Bae-Suah.pdf
    • http://muicuiu.dumb1.com/4a00a07a06a09a01/She-Found-Them-by-Dab10.pdf
    • http://muicuiu.dumb1.com/3a02a07a06a02a09/Now-That-I-ve-Found-You-by-Ciara-Geraghty.pdf
    • http://muicuiu.dumb1.com/3a04a06a00a01a09/The-Alpha-Found-Me-by-yourlilkitty.pdf
    • http://muicuiu.dumb1.com/2a04a07a00a04a05/The-Found-Child-by-Jo-Crow.pdf
    • http://muicuiu.dumb1.com/8a07a01a02a09/Found-God-s-Will-by-John-F-MacArthur-Jr-.pdf
    • http://muicuiu.dumb1.com/7a03a06a01a04/Nearly-Found-Nearly-Gone-2-by-Elle-Cosimano.pdf
    • http://muicuiu.dumb1.com/2a07a01a07a07a06/Lost-and-Found-by-Tom-Winter.pdf
    • http://muicuiu.dumb1.com/2a00a00a09a09a03/Lost-amp-Found-by-J-Holland.pdf
    • http://muicuiu.dumb1.com/3a03a02a09a03a06/Lost-and-Found-by-Syd-McGinley.pdf
    • http://muicuiu.dumb1.com/8a07a08a00a01a05/How-I-Found-You-by-Gabriella-Lepore.pdf
    • http://muicuiu.dumb1.com/4a03a06a02a00a05/How-They-Were-Found-by-Matt-Bell.pdf
    • http://muicuiu.dumb1.com/1a00a07a08a05a03/How-I-Found-You-by-Gabriella-Lepore.pdf
    • http://muicuiu.dumb1.com/3a02a07a05a02a02/Found-In-Shadow-Teacher-s-Pet-2-by-Kat-Kingsley.pdf
    • http://muicuiu.dumb1.com/4a04a08a04a01a02/Lost-And-Found-by-Eileen-Griffin.pdf

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