Malicious PDF — malware analysis report

Static analysis result for SHA-256 def893382ad966e7…

MALICIOUS

PDF

15.6 KB Created: 2019-05-02 10:32:42 +01:00 Authoring application: mPDF 5.7
MD5: 1bbd75bf2106c99268a7ed9a8b8c820d SHA-1: 7ac15695451afb7d82e47551085ccb36390b6a63 SHA-256: def893382ad966e770e54113f9090c4a53e1b4eeff9fd9a95f867673ce0ae93b
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of links to external PDF files hosted on the domain 'muicuiu.dumb1.com'. This pattern is indicative of a link farm designed to drive traffic or potentially host malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of numerous links to a single suspicious domain is the primary indicator of malicious intent.

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/6a08a02a03a06a06/High-School-DxD-Vol-10-by-Hiroji-Mishima.pdf
    • http://muicuiu.dumb1.com/4a08a03a07a00a01/Highschool-of-the-Dead-Vol-1-Highschool-of-the-Dead-1-by-Daisuke-Sato.pdf
    • http://muicuiu.dumb1.com/4a00a06a00a03a07/Highschool-of-the-Dead-Band-1-by-Daisuke-Sato.pdf
    • http://muicuiu.dumb1.com/6a02a09a01a07a05/Highschool-of-the-Dead-Band-2-by-Daisuke-Sato.pdf
    • http://muicuiu.dumb1.com/7a08a09a03a01a03/R-Zh-Dingnoanime-Sh-J-Xingke-DAO-Zh-Ng-Zhu-Qiu-Bu-Erufenr-To-Fur-Jingu-Shigurui-Gorugo13-Xue-Yuan-Mo-Shi-Lu-Highschool-of-the-Dead-by-S-Su-Wikipedia.pdf
    • http://muicuiu.dumb1.com/6a08a02a03a08a06/Reverse-2-by-Kazuhiko-Mishima.pdf
    • http://muicuiu.dumb1.com/6a02a09a05a01/The-Sea-of-Fertility-by-Yukio-Mishima.pdf
    • http://muicuiu.dumb1.com/6a07a08a09a04a03/Depois-do-Banquete-by-Yukio-Mishima.pdf
    • http://muicuiu.dumb1.com/4a09a04a05a09a05/The-Sound-of-Waves-by-Yukio-Mishima.pdf
    • http://muicuiu.dumb1.com/6a08a02a03a06a03/The-First-Stage-Of-Love-by-Kazuhiko-Mishima.pdf
    • http://muicuiu.dumb1.com/3a09a00a06a09a00/The-Sound-of-Waves-by-Yukio-Mishima.pdf
    • http://muicuiu.dumb1.com/4a08a05a05a01a00/Five-Modern-No-Plays-by-Yukio-Mishima.pdf
    • http://muicuiu.dumb1.com/2a05a09a01a07a00/Thirst-for-Love-by-Yukio-Mishima.pdf
    • http://muicuiu.dumb1.com/6a03a00a08a00a03/La-foresta-in-fiore-by-Yukio-Mishima.pdf
    • http://muicuiu.dumb1.com/6a08a02a04a00a03/Mishima-A-Life-in-Four-Chapters-by-Jesse-Russell.pdf
    • http://muicuiu.dumb1.com/3a09a02a04a03a08/The-Temple-of-the-Golden-Pavilion-by-Yukio-Mishima.pdf
    • http://muicuiu.dumb1.com/4a04a03a01a08a09/Death-in-Midsummer-and-Other-Stories-by-Yukio-Mishima.pdf
    • http://muicuiu.dumb1.com/3a06a01a07a09/The-Temple-of-the-Golden-Pavilion-by-Yukio-Mishima.pdf
    • http://muicuiu.dumb1.com/6a08a02a03a08a04/-Miwaku-no-Ringo-by-Kazuhiko-Mishima.pdf
    • http://muicuiu.dumb1.com/6a09a06a03a05a06/VitaminZ-vol-1-Vitamin-Z-Welcome-Our-New-Supplement-Boys-1-by-Kazuhiko-Mishima.pdf
    • http://muicuiu.dumb1.com/4a09a0

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