Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9825cfd8414bb9…

MALICIOUS

PDF

17.7 KB Created: 2019-04-30 04:57:44 +01:00 Authoring application: mPDF 5.7
MD5: b99ad3f6fd5c214294dd10783d972f55 SHA-1: 6ab799f9827acc9b5ee0890b9c7d21d72979c6fc SHA-256: 5b9825cfd8414bb9f5b381e47a6d4fee184533e0f28d271903b342dcdb3b6cc4
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are presented in a way that mimics a download button. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the structure and heuristics suggest the PDF is designed to trick users into navigating to external URLs, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9807

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/9a03a05a04a06a02/Hiroshige-A-Shoal-Of-Fishes-by-Hiroshige-Ando-amp-x304-.pdf
    • http://muicuiu.dumb1.com/9a03a05a03a08a07/The-Sketchbooks-of-Hiroshige-by-Hiroshige-Utagawa.pdf
    • http://muicuiu.dumb1.com/9a05a08a01a01a05/Italian-Renaissance-Art-from-Czech-Collections-Drawings-and-Prints-December-12-1996-February-9-1997-Kinsky-Palace-Collection-of-Prints-and-Drawi-by-Martin-Zlatohlavek.pdf
    • http://muicuiu.dumb1.com/1a09a07a09a03a05/A-Summer-of-Faulkner-As-I-Lay-Dying-The-Sound-and-the-Fury-Light-in-August-by-William-Faulkner.pdf
    • http://muicuiu.dumb1.com/5a01a05a06a06a09/Holding-the-Line-How-Britain-s-Railways-Were-Saved-Richard-Faulkner-and-Chris-Austin-by-Richard-Faulkner.pdf
    • http://muicuiu.dumb1.com/3a03a01a08a04a02/The-Portable-Faulkner-by-William-Faulkner.pdf
    • http://muicuiu.dumb1.com/6a09a02a06a02a08/The-William-Faulkner-Audio-Collection-by-William-Faulkner.pdf
    • http://muicuiu.dumb1.com/9a03a05a03a08a08/Hiroshige-by-Christopher-Wynne.pdf
    • http://muicuiu.dumb1.com/9a03a05a03a07a08/Hiroshige-by-Matthi-Forrer.pdf
    • http://muicuiu.dumb1.com/9a03a05a04a07a05/Hiroshige-Famous-Views-by-Narazaki.pdf
    • http://muicuiu.dumb1.com/9a03a05a04a06a06/Hiroshige-Bk-of-Postcards-REV-by-Brooklyn-Museum-of-Art.pdf
    • http://muicuiu.dumb1.com/9a03a05a03a09a03/Hiroshige-One-Hundred-Views-of-Edo-by-Mikhail-Uspensky.pdf
    • http://muicuiu.dumb1.com/9a03a05a04a08a06/Hiroshige-s-View-of-Tokyo-by-Oliver-Impey.pdf
    • http://muicuiu.dumb1.com/9a03a05a04a07a02/Hiroshige-s-Views-of-Mt-Fuji-by-Oliver-Impey.pdf
    • http://muicuiu.dumb1.com/9a03a05a04a07a07/Hiroshige-and-Japanese-Landscapes-by-Yone-D-Noguchi.pdf
    • http://muicuiu.dumb1.com/9a03a05a04a05a09/Rediscovering-the-Old-Tokaido-In-the-Footsteps-of-Hiroshige-by-Patrick-Carey.pdf
    • http://muicuiu.dumb1.com/2a01a07a01a06a00/Finger-Prints-by-Barbara-Delinsky.pdf
    • http://muicuiu.dumb1.com/5a00a02a00a02a07/New-Prints-In-Old-Calico-by-Jennifer-Lynn.pdf
    • http://muicuiu.dumb1.com/7a05a03a01a03a03/Rupert-by-KayeC-Jones.pdf
    • http://muicuiu.dumb1.com/9a05a07a09a03/Before-the-Dawn-by-Rupert-Copping.pdf

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