Malicious PDF — malware analysis report

Static analysis result for SHA-256 66186c959a3ffc7f…

MALICIOUS

PDF

14.0 KB Created: 2019-04-29 22:49:50 +01:00 Authoring application: mPDF 5.7
MD5: 3cac46579f3745a2ee62df5eaffc13d9 SHA-1: fd42be808aef7912225f0cb90cf8e383036aae25 SHA-256: 66186c959a3ffc7f3e6cbec29dafd4a2efeb4093dfa765daf6f420cfb2053e5f
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, disguised with titles related to 'The Legend of Zelda' series. This technique, identified as a 'PDF_SEO_LINK_FARM', is often used to generate traffic or lead users to potentially malicious content. While no scripts were extracted, the ML classifier and the link farm heuristic strongly indicate malicious intent, likely to facilitate a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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/5a05a09a05a06a02/Zelda-by-Zelda-D-39-Aprano.pdf
    • http://muicuiu.dumb1.com/2a08a07a01a03a08/The-Legend-of-Zelda-Oracle-of-Ages-Zelda-5-by-Akira-Himekawa.pdf
    • http://muicuiu.dumb1.com/1a04a04a01a03a01/The-Legend-of-Zelda-Four-Swords---Part-2-Zelda-7-by-Akira-Himekawa.pdf
    • http://muicuiu.dumb1.com/2a08a07a04a02a09/The-Legend-of-Zelda-Four-Swords---Part-1-Zelda-6-by-Akira-Himekawa.pdf
    • http://muicuiu.dumb1.com/1a04a04a01a07a06/The-Legend-of-Zelda-A-Link-to-the-Past-Zelda-9-by-Akira-Himekawa.pdf
    • http://muicuiu.dumb1.com/5a05a09a05a06a00/The-Adventures-of-Zelda-The-Second-Saga-Zelda-2-by-Kristen-Otte.pdf
    • http://muicuiu.dumb1.com/5a05a00a09a01/The-Legend-of-Zelda-The-Minish-Cap-Zelda-8-by-Akira-Himekawa.pdf
    • http://muicuiu.dumb1.com/8a08a02a05a08/Dear-Scott-Dearest-Zelda-The-Love-Letters-of-F-Scott-and-Zelda-Fitzgerald-by-F-Scott-Fitzgerald.pdf
    • http://muicuiu.dumb1.com/4a01a03a04a06a00/MYth-My-Seasons-by-Zelda-C-W-.pdf
    • http://muicuiu.dumb1.com/9a01a09a06a01/Fifth-Born-by-Zelda-Lockhart.pdf
    • http://muicuiu.dumb1.com/1a00a00a00a09a05a06/Zelda-T07-the-Minish-Cap-by-Akira-Himekawa.pdf
    • http://muicuiu.dumb1.com/3a02a03a06a08a09/Call-Me-Zelda-by-Erika-Robuck.pdf
    • http://muicuiu.dumb1.com/5a05a09a05a06a05/Zelda-Wisdom-by-Carol-Gardner.pdf
    • http://muicuiu.dumb1.com/5a05a09a05a04a09/Zelda-s-Big-Adventure-by-Marie-Alafaci.pdf
    • http://muicuiu.dumb1.com/5a05a09a04a08a06/The-Legend-of-Zelda-Encyclopedia-by-Nintendo.pdf
    • http://muicuiu.dumb1.com/8a00a02a06a07a09/The-Legend-Of-Zelda-Tome-2-by-Akira-Himekawa.pdf
    • http://muicuiu.dumb1.com/4a01a03a00a00a05/The-Legend-of-Zelda-Boxed-Set-by-David-Hodgson.pdf
    • http://muicuiu.dumb1.com/5a05a09a05a06a04/Princess-Zelda-and-the-Frog-by-Carol-Gardner.pdf
    • http://muicuiu.dumb1.com/2a06a08a07a08a09/The-Legend-of-Zelda-Forgotten-Goddess-by-N-Felts.pdf
    • http://muicuiu.dumb1.com/5a05a09a05a00a09/Zelda-Fitzgerald-The-Biography-by-University-Press-Biographies.pdf

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