Malicious PDF — malware analysis report

Static analysis result for SHA-256 b026262e2d7c0ad1…

MALICIOUS

PDF

14.2 KB Created: 2019-05-01 22:07:42 +01:00 Authoring application: mPDF 5.7
MD5: f81896a7eb4ae1b6a207b3e865b51383 SHA-1: 3095167af32c236333733ab5451d2c9b287e4ca8 SHA-256: b026262e2d7c0ad1ed672d83de608f6bb5b0301e6a6528809b59c105c89e2150
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 distribution mechanism. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. While no scripts were extracted, the structure and heuristics indicate the PDF's primary purpose is to redirect users to external resources, potentially for malicious downloads or phishing. The URLs themselves are currently marked as benign, but the overall pattern is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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://loaminoo.linkpc.net/6091099090093/Mrs-Jeffries-Takes-the-Stage-Mrs-Jeffries-10-by-Emily-Brightwell.pdf
    • http://loaminoo.linkpc.net/7090091094099/Mrs-Jeffries-Takes-Stock-Mrs-Jeffries-4-by-Emily-Brightwell.pdf
    • http://loaminoo.linkpc.net/7097092097090/Mrs-Jeffries-Stalks-the-Hunter-Mrs-Jeffries-19-by-Emily-Brightwell.pdf
    • http://loaminoo.linkpc.net/8090098094091/Mrs-Jeffries-and-the-Silent-Knight-Mrs-Jeffries-20-by-Emily-Brightwell.pdf
    • http://loaminoo.linkpc.net/7099092098096/Mrs-Jeffries-Speaks-Her-Mind-Mrs-Jeffries-27-by-Emily-Brightwell.pdf
    • http://loaminoo.linkpc.net/7091092097095/Mrs-Jeffries-Forges-Ahead-Mrs-Jeffries-28-by-Emily-Brightwell.pdf
    • http://loaminoo.linkpc.net/8091099096094/The-Ghost-and-Mrs-Jeffries-Mrs-Jeffries-3-by-Emily-Brightwell.pdf
    • http://loaminoo.linkpc.net/7093092093094/Mrs-Jeffries-on-the-Ball-Mrs-Jeffries-5-by-Emily-Brightwell.pdf
    • http://loaminoo.linkpc.net/2097091097098091/Mrs-Jeffries-Defends-Her-Own-Mrs-Jeffries-30-by-Emily-Brightwell.pdf
    • http://loaminoo.linkpc.net/4096094091099093/Mrs-Jeffries-Rights-a-Wrong-by-Emily-Brightwell.pdf
    • http://loaminoo.linkpc.net/3090091090096096/Caliente-by-J-M-Jeffries.pdf
    • http://loaminoo.linkpc.net/1090090093095098/The-Trillionist-by-Sagan-Jeffries.pdf
    • http://loaminoo.linkpc.net/5091097092096/The-Unreals-by-Donald-Jeffries.pdf
    • http://loaminoo.linkpc.net/8093096090095095/The-Captivating-Chauffeur-by-J-M-Jeffries.pdf
    • http://loaminoo.linkpc.net/4094095095095098/The-Pirate-Lord-by-Sabrina-Jeffries.pdf
    • http://loaminoo.linkpc.net/6094092092095/The-Forbidden-Lord-by-Sabrina-Jeffries.pdf
    • http://loaminoo.linkpc.net/6096091093097/Solomon-s-Tale-by-Sheila-Jeffries.pdf
    • http://loaminoo.linkpc.net/1097093093095093/When-the-Rogue-Returns-The-Duke-s-Men-2-by-Sabrina-Jeffries.pdf
    • http://loaminoo.linkpc.net/1094090096095092/Married-to-the-Viscount-Swanlea-Spinsters-5-by-Sabrina-Jeffries.pdf
    • http://loaminoo.linkpc.net/1094095093096090/One-Night-with-a-Prince-Royal-Brotherhood-3-by-Sabrina-Jeffries.pdf
    • http://loaminoo.linkpc.net/5

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