Malicious PDF — malware analysis report

Static analysis result for SHA-256 3948f6c671c6b151…

MALICIOUS

PDF

13.0 KB Created: 2019-04-30 04:43:22 +01:00 Authoring application: mPDF 5.7
MD5: 6b92f33117e32b03361c55abcf740a8c SHA-1: 6136b83debace7438bcb275ac152f79e4d40d5c5 SHA-256: 3948f6c671c6b151b82e95b9d5849e620ae6430226af9b93edbc7a99588abaaf
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. While the ML classifier also flagged the PDF as malicious, no scripts were extracted, and the document body was unreadable. The primary attack pattern appears to be the distribution of numerous links, potentially leading to malicious websites or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9006

Heuristics 2

  • 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.
  • 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/5a05a09a09a05/Rule-34-Halting-State-2-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/2a04a08a03a03/Halting-State-Halting-State-1-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/2a00a08a09a02a02/Halting-State-Halting-State-1-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/2a00a08a05a08a04/Rule-34-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/3a05a04a04a01a06/Dark-State-Empire-Games-2-Merchant-Princes-Universe-8-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/2a02a05a07a04a03/Bit-Rot-Freyaverse-1-5-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/2a04a08a04a06/Accelerando-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/3a00a07a07a08a09/A-Colder-War-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/7a01a08a08a06a06/Missile-Gap-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/3a01a09a05a02/The-Annihilation-Score-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/2a04a08a06a04/Singularity-Sky-Eschaton-1-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/8a00a02a08a06a04/Festival-Of-Fools-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/7a01a08a08a06a03/Down-on-the-Farm-Laundry-Files-2-5-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/6a01a03a02/The-Delirium-Brief-Laundry-Files-8-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/2a04a08a02a01/Saturn-s-Children-Freyaverse-1-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/2a09a00a04a07a01/The-Merchants-War-The-Merchant-Princes-4-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/2a06a07a02a03/The-Jennifer-Morgue-Laundry-Files-2-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/4a00a03a04a01a07/The-Bloodline-Feud-The-Merchant-Princes-1-2-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/1a00a01a03a03/The-Rhesus-Chart-Laundry-Files-5-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/3a09a07a05a09a08/The-Revolution-Business-The-Merchant-Princes-5-by-Charles-Stross.pdf
    • http://muicuiu.dumb1.com/7a01a08a08a06a03/Down-on-the-Farm-Laundry-Files-2-5-by-Charles-Stross.pd

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