Malicious PDF — malware analysis report

Static analysis result for SHA-256 8871759a2e86d8b6…

MALICIOUS

PDF

16.6 KB Created: 2019-04-30 03:54:10 +01:00 Authoring application: mPDF 5.7
MD5: 9b5cb8136121fe6150b0d181d924fb82 SHA-1: aefe2baac76ddd25bc114be5c728ec61179fa698 SHA-256: 8871759a2e86d8b6a29fbfa7d8d231f2b12e8b7934b2a767cd3a03ba262fd2d3
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, forming a link farm. The heuristic PDF_SEO_LINK_FARM specifically identified this behavior, indicating the document's primary purpose is to redirect users to external content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was unreadable, but the link farm is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9810

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/2a09a07a09a07a03/Wanted-Dead-or-Undead-Zombie-West-1-by-Angela-Scott.pdf
    • http://muicuiu.dumb1.com/9a02a04a03a02/Survivor-Roundup-Zombie-West-2-by-Angela-Scott.pdf
    • http://muicuiu.dumb1.com/3a06a01a02a09a02/The-Last-Zombie-Dead-New-World-The-Last-Zombie-1-by-Brian-Keene.pdf
    • http://muicuiu.dumb1.com/8a04a06a07a02/Wanted-Undead-or-Alive-Love-at-Stake-12-by-Kerrelyn-Sparks.pdf
    • http://muicuiu.dumb1.com/7a09a02a09a07a05/Wanted-Undead-or-Alive-Lily-Quinn-book-1-by-Natalie-Severine.pdf
    • http://muicuiu.dumb1.com/3a05a03a09a00a03/My-Zombie-Boyfriend-The-Undead-Canadian-1-by-T-Strange.pdf
    • http://muicuiu.dumb1.com/3a09a03a08a03a00/My-Zombie-Boyfriend-The-Undead-Canadian-1-by-T-Strange.pdf
    • http://muicuiu.dumb1.com/5a01a07a04a06a09/Zombie-Indiana-Zombie-3-by-Scott-Kenemore.pdf
    • http://muicuiu.dumb1.com/4a02a01a06a00a04/The-Undead-War-Tales-of-the-Zombie-Apocalypse-by-John-Thompson.pdf
    • http://muicuiu.dumb1.com/3a06a01a00a00a03/Zombie-Apocalypse-Preparation-How-to-Survive-in-an-Undead-World-and-Have-Fun-Doing-It-by-David-Houchins.pdf
    • http://muicuiu.dumb1.com/4a09a02a01a06a07/Everything-You-Always-Wanted-to-Know-About-Acting-by-West-End-Producer.pdf
    • http://muicuiu.dumb1.com/3a06a01a02a08a04/Dead-Undead-or-Somewhere-in-Between-Rhiannon-s-Law-1-by-J-A-Saare.pdf
    • http://muicuiu.dumb1.com/2a06a02a08a09a06/Dead-Undead-or-Somewhere-in-Between-Rhiannon-s-Law-1-by-J-A-Saare.pdf
    • http://muicuiu.dumb1.com/3a07a05a06a04a04/Charlie-Dead-and-the-Seeds-of-Zombie-Chaos-Charlie-Dead-2-by-Geoff-Camphire.pdf
    • http://muicuiu.dumb1.com/9a07a03a01a00a07/Possession-of-the-Dead-Undead-World-Trilogy-2-by-A-P-Fuchs.pdf
    • http://muicuiu.dumb1.com/9a07a02a09a03a05/Blood-of-the-Dead-Undead-World-Trilogy-1-by-A-P-Fuchs.pdf
    • http://muicuiu.dumb1.com/1a07a04a08a00a01/Wanted---Dead-or-In-Love-by-Kym-Brunner.pdf
    • http://muicuiu.dumb1.com/1a09a01a01a01/Necrologue-The-Diva-Book-of-the-Dead-and-the-Undead-by-Helen-Sandler.pdf
    • http://muicuiu.dumb1.com/1a08a01a06a06a06/Dead-Over-Heels-Wyndham-Werewolf-6-Undead-6-5-by-MaryJanice-Davidson.pdf
    • http://muicuiu.dumb1.com/3a06a00a07a01a04/Lightning-Fighting-the-Living-Dead-Undead-Rain-3-by-Shaun-Harbinger.pdf
    • http://muicuiu.dumb1.com/3a06a01a00a00a03/Zombie-Apocalypse-Prepara

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