Malicious PDF — malware analysis report

Static analysis result for SHA-256 934049fde3a76ff7…

MALICIOUS

PDF

23.8 KB Created: 2019-04-30 03:43:27 +01:00 Authoring application: mPDF 5.7 First seen: 2021-11-21
MD5: 0363878bebc3b05e8e51575116d57200 SHA-1: 573e13762a2113745db426d1512d0c879b094d11 SHA-256: 934049fde3a76ff7aef3da3a7eccc02a563a6238c78ff02dbae923b962c29be2
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, masquerading as book downloads, which is a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the structure suggests potential for JavaScript execution to facilitate the redirection to these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/4a04a05a05a01a01/Starring-Sherlock-Holmes-A-Century-of-the-Master-Detective-on-Screen-by-David-Stuart-Davies.pdf In PDF document text
    • http://muicuiu.dumb1.com/8a01a01a01a07a01/Sherlock-Holmes-The-Last-Act-by-David-Stuart-Davies.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a03a02a03a04a08/The-Further-Adventures-of-Sherlock-Holmes---The-Counterfeit-Detective-by-Stuart-Douglas.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a01a03a00a01a01/Sherlock-Holmes-s-London-Following-the-Footsteps-of-London-s-Master-Detective-by-Tsukasa-Kobayashi.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a01a01a05a02a02/Sherlock-Holmes-time-detective-by-Adrian-Sherlock.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a07a09a03a09a07/The-Detective-and-The-Woman-A-Novel-of-Sherlock-Holmes-by-Amy-Thomas.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a01a01a01a01a04/The-Detective-the-Woman-and-the-Winking-Tree-A-Novel-Of-Sherlock-Holmes-by-Amy-Thomas.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a02a08a02a05a08/Becoming-Holmes-The-Boy-Sherlock-Holmes-His-Final-Case-The-Boy-Sherlock-Holmes-6-by-Shane-Peacock.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a01a07a02a05a03/Sherlock-Holmes-The-Adventures-of-Sherlock-Holmes-Short-Stories-Collected-Illustrated-and-Annotated-by-Arthur-Conan-Doyle.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a05a06a09a05a00/A-Study-in-Scarlet-Introducing-Sherlock-Holmes-The-Sherlock-Holmes-Collection-Volume-1-by-Arthur-Conan-Doyle.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a07a03a03a00a04/The-Adventures-of-Sherlock-Holmes-Sherlock-Holmes-The-Definitive-Collection-3-by-Arthur-Conan-Doyle.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a00a07a01a01a09/Young-Sherlock-Holmes-Nur-der-Tod-ist-umsonst---Sherlock-Holmes-ermittelt-in-Schottland-by-Andy-Lane.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a07a01a06a06a06/The-Case-Book-of-Sherlock-Holmes-Sherlock-Holmes-9-by-Arthur-Conan-Doyle.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a03a08a05a02/The-Original-Illustrated-Sherlock-Holmes-Sherlock-Holmes-3-6-by-Arthur-Conan-Doyle.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a00a04a08a02a09/The-Penguin-Complete-Sherlock-Holmes-Sherlock-Holmes-1-9-by-Arthur-Conan-Doyle.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a08a03a09a02a01/The-Adventures-of-Sherlock-Holmes-Sherlock-Holmes-3-by-Arthur-Conan-Doyle.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a05a08a03a06/The-Return-of-Sherlock-Holmes-Sherlock-Holmes-6-by-Arthur-Conan-Doyle.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a09a05a08a02a07/His-Last-Bow-Some-Reminiscences-of-Sherlock-Holmes-Sherlock-Holmes-8-by-Arthur-Conan-Doyle.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a01a04a08a09a03/The-Return-of-Sherlock-Holmes-Sherlock-Holmes-6-by-Arthur-Conan-Doyle.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a05a03a05a07a04/Sherlock-Holmes-Sherlock-Holmes-1-by-Arthur-Conan-Doyle.pdfIn PDF document text

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