Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6909c14d84fcc4f…

MALICIOUS

PDF

15.2 KB Created: 2019-05-07 02:57:00 +01:00 Authoring application: mPDF 5.7
MD5: 0414a5e745dc9c803dff087ee10b0e47 SHA-1: e5d3688953e5eb56da11c46708170a926e3dac84 SHA-256: b6909c14d84fcc4f041e1bd477b380173f11ec96795604a95587f004577ba08c
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While most of these links point to benign book titles, the sheer volume and the ML_NYX_PDF_MALICIOUS classification suggest a malicious intent, possibly for SEO spam or to distribute further malware. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific payload.

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/9a01a03a08a00/Resenting-the-Hero-Hero-1-by-Moira-J-Moore.pdf
    • http://muicuiu.dumb1.com/1a08a07a09a04a04/Heroes-Return-Hero-5-by-Moira-J-Moore.pdf
    • http://muicuiu.dumb1.com/1a08a08a02a01a02/Heroes-Adrift-Hero-3-by-Moira-J-Moore.pdf
    • http://muicuiu.dumb1.com/3a04a09a01a05a07/Hero-in-the-Highlands-No-Ordinary-Hero-1-by-Suzanne-Enoch.pdf
    • http://muicuiu.dumb1.com/9a08a06a01a09/Prelude-to-a-Hero-Chronicles-of-a-Hero-1-by-Jaime-Buckley.pdf
    • http://muicuiu.dumb1.com/5a06a09a00a02/One-Night-with-a-Hero-The-Hero-2-by-Laura-Kaye.pdf
    • http://muicuiu.dumb1.com/4a01a04a08a09a09/Her-Forbidden-Hero-The-Hero-1-by-Laura-Kaye.pdf
    • http://muicuiu.dumb1.com/1a00a03a09a06a01a07/My-Hero-Academia-Vol-4-Der-Junge-dem-alles-in-die-Wiege-gelegt-wurde-My-Hero-Academia-4-by-Kohei-Horikoshi.pdf
    • http://muicuiu.dumb1.com/1a01a02a09a07a06/--1-Boku-No-Hero-Academia-1-My-Hero-Academia-1-by-Kohei-Horikoshi.pdf
    • http://muicuiu.dumb1.com/2a04a00a09a02a07/Big-Hero-6-Junior-Novelization-Disney-Big-Hero-6-by-Walt-Disney-Company.pdf
    • http://muicuiu.dumb1.com/4a08a05a03a07a07/How-a-Realist-Hero-Rebuilt-the-Kingdom-Volume-1-Realist-Hero-1-by-Dojyomaru.pdf
    • http://muicuiu.dumb1.com/1a07a03a02a07a08/Hero-Hero-1-by-Leighton-Del-Mia.pdf
    • http://muicuiu.dumb1.com/6a00a08a01a03a03/Obnoxious-Hero-kun-Obnoxious-Hero-kun-1-by-Amanda-Rahimi.pdf
    • http://muicuiu.dumb1.com/3a02a02a04a02a04/The-Hero-Always-Wins-The-Hero-Always-Wins-1-by-Robert-Eaton.pdf
    • http://muicuiu.dumb1.com/1a03a04a08a05a04/The-Forever-Hero-Forever-Hero-1-3-by-L-E-Modesitt-Jr-.pdf
    • http://muicuiu.dumb1.com/3a01a05a06a03a01/Heroes-at-Risk-by-Moira-J-Moore.pdf
    • http://muicuiu.dumb1.com/2a05a07a01a08a04/My-Hero-by-Max-Vos.pdf
    • http://muicuiu.dumb1.com/9a07a09a01a07a08/Two-In-Two-Out-Hero-2-by-G-A-Hauser.pdf
    • http://muicuiu.dumb1.com/9a07a09a01a01a03/Man-to-Man-Hero-1-by-G-A-Hauser.pdf
    • http://muicuiu.dumb1.com/2a09a00a07a07a09/So-Not-a-Hero-by-S-J-Delos.pdf
    • http://muicuiu.dumb1.com/1a01a02a09a07a06/--1-Boku-No-He

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