Malicious PDF — malware analysis report

Static analysis result for SHA-256 8239a7e98822ddb3…

MALICIOUS

PDF

18.9 KB Created: 2019-04-30 04:15:11 +01:00 Authoring application: mPDF 5.7
MD5: 9afaf3d03a32bc95482c68ab504250d8 SHA-1: a585fcab7154b5b61764a3c9e838c172e8fbe290 SHA-256: 8239a7e98822ddb3542cdd2deba278f406bf11e3d741393eacf267f66b74ff8f
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs disguised as book downloads, forming a link farm. This heuristic, combined with the ML classifier, indicates a malicious intent to redirect users to potentially harmful content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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/9a09a06a08a07/Athanasius-Kircher-A-Renaissance-Man-and-the-Quest-for-Lost-Knowledge-by-Joscelyn-Godwin.pdf
    • http://muicuiu.dumb1.com/9a05a04a00a04a03/The-Stars-of-Galileo-Galilei-and-the-Universal-Knowledge-of-Athanasius-Kircher-by-Roberto-Buonanno.pdf
    • http://muicuiu.dumb1.com/5a00a03a08a07a07/One-Lost-Summer-by-Richard-Godwin.pdf
    • http://muicuiu.dumb1.com/2a03a01a09a02a00/The-Nothing-Equation-by-Tom-Godwin-Science-Fiction-Fantasy-by-Tom-Godwin.pdf
    • http://muicuiu.dumb1.com/6a06a00a00a01/Proof-A-Short-Tale-of-the-Undead-The-Books-of-Lost-Knowledge-by-M-R-Graham.pdf
    • http://muicuiu.dumb1.com/5a06a01a01a09a09/Quest-for-the-Lost-Treasure-by-Gerry-Gaston.pdf
    • http://muicuiu.dumb1.com/8a04a08a01a07/The-Valley-of-the-Lost-Deltora-Quest-7-by-Emily-Rodda.pdf
    • http://muicuiu.dumb1.com/1a00a00a02a04a06a02/The-Quest-for-Anastasia-Solving-the-Mystery-of-the-Lost-Romanovs-by-John-Klier.pdf
    • http://muicuiu.dumb1.com/2a08a02a08a08a01/In-Search-of-Lost-Frogs-The-Quest-to-Find-the-World-s-Rarest-Amphibians-by-Robin-Moore.pdf
    • http://muicuiu.dumb1.com/5a05a04a02a06a03/Riddle-of-the-Labyrinth-The-Quest-to-Crack-an-Ancient-Code-and-the-Discovery-of-a-Lost-Civilisation-by-Margalit-Fox.pdf
    • http://muicuiu.dumb1.com/6a01a01a08a03a03/Exploring-the-Kingdom-of-Saturn-Kircher-s-Latium-and-Its-Legacy-by-Harry-B-Evans.pdf
    • http://muicuiu.dumb1.com/7a09a01a04a06a04/Athanasius-by-Simonetta-Carr.pdf
    • http://muicuiu.dumb1.com/1a00a03a06a04a01/On-the-Incarnation-by-Athanasius-of-Alexandria.pdf
    • http://muicuiu.dumb1.com/5a05a02a06a06a06/The-Life-of-St-Anthony-by-Athanasius-of-Alexandria.pdf
    • http://muicuiu.dumb1.com/1a01a06a05a05a03a07/The-Lost-Gospel-The-Quest-for-the-Gospel-of-Judas-Iscariot-by-Herbert-Krosney.pdf
    • http://muicuiu.dumb1.com/1a00a00a04a01a06a09/Leben-des-heiligen-Antonius-Vita-Antonii-by-Athanasius-of-Alexandria.pdf
    • http://muicuiu.dumb1.com/4a01a02a07a09a01/The-Underground-Knowledge-Series-I-V-Underground-Knowledge-1-5-by-James-Morcan.pdf
    • http://muicuiu.dumb1.com/3a04a01a04a08a07/Incentive-by-Pam-Godwin.pdf
    • http://muicuiu.dumb1.com/4a00a05a05a02a07/Before-You-Go-by-Nikki-Godwin.pdf
    • http://muicuiu.dumb1.com/1a03a03a01a05a05/Dark-Notes-by-Pam-Godwin.pdf

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