Malicious PDF — malware analysis report

Static analysis result for SHA-256 96255aee906ac6c5…

MALICIOUS

PDF

19.0 KB Created: 2019-05-03 07:08:03 +01:00 Authoring application: mPDF 5.7 First seen: 2021-06-04
MD5: 65d969ffcafb4b496f30227894635711 SHA-1: 16ccdc231606c69ffa0d9978bc5476a2c798ac08 SHA-256: 96255aee906ac6c5e39a96d423d5d7c574aa6a1570625d10794bb3491fa52c32
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm, containing numerous embedded URLs that point to external PDF documents. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of these links, suggesting an attempt to manipulate search engine results or distribute content through a large number of redirects. While the document body itself is heavily obfuscated, the presence of embedded URLs and the ML classifier's high confidence score point towards malicious intent, likely related to SEO spam or potentially distributing further malicious content. The primary attack pattern observed is the creation of a link farm, potentially to drive traffic or distribute malware indirectly.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/1a01a06a02a09a05a05/Prey-Jurassic-Park-Adventures-2-by-Scott-Ciencin.pdf In PDF document text
    • http://muicuiu.dumb1.com/1a01a06a02a09a06a05/Flyers-Jurassic-Park-Adventures-3-by-Scott-Ciencin.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a06a02a09a06a00/Jurassic-Park-Michael-Crichton-List-of-Jurassic-Park-Characters-the-Lost-World-Jurassic-Park-Jurassic-Park-III-Biological-Issue-by-Source-Wikipedia.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a00a02a03a01/Jurassic-Park-The-Lost-World-Jurassic-Park-1-2-by-Michael-Crichton.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a06a02a08a02a08/Jurassic-Sea-Jurassic-Adventures-2-by-Viktor-Zarkov.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a03a07a06a01a00/Jurassic-World-Jurassic-Park-The-Lost-World-by-Michael-Crichton.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a05a06a07a01a08/Jurassic-Park-and-Congo-by-Michael-Crichton.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a06a02a09a05a07/The-Dinosaurs-Of-Jurassic-Park-by-Wendy-Larson.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a06a03a01a04a00/Jurassic-Park-Piano-Solos-by-John-Williams.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a06a03a01a04a09/Jurassic-Park-Film-Storybook-by-Jane-B-Mason.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a06a02a09a06a03/Jurassic-Park-easy-piano-by-John-Williams.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a06a03a01a04a02/Jurassic-Park-The-Lost-World-The-Junior-Novelization-by-Gail-Herman.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a06a03a01a03a09/Classic-Jurassic-Park-Volume-2-Raptor-s-Revenge-by-Walter-Simonson.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a06a03a00a05a06/Jurassic-Block-Minecraft-Steve-Adventures-3-by-Funny-Comics.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a09a04a01a09a00/The-Michael-Crichton-Collection-Jurassic-Park-The-Lost-World-The-Andromeda-Strain-by-Michael-Crichton.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a01a00a05a00a09/Spirits-in-the-Park-Gods-of-Manhattan-2-by-Scott-Mebus.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a06a02a08a08a05/Jurassic-Earth-2-Prologue-The-Last-Woman-on-Earth-The-Jurassic-Earth-Saga-by-Logan-T-Stark.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a08a01a08a05a03/Canyon-Sacrifice-National-Park-Mystery-1-by-Scott-Graham.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a04a03a00a01a02/Bear-in-the-Back-Seat-II-Adventures-of-a-Wildlife-Ranger-in-the-Great-Smoky-Mountains-National-Park-by-Carolyn-Jourdan.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a07a04a01a01a06/Adventures-of-a-Waterboy-by-Mike-Scott.pdfIn PDF document text

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