Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab4fe8b81a9b6af0…

MALICIOUS

PDF

21.3 KB Created: 2019-04-29 23:14:13 +01:00 Authoring application: mPDF 5.7
MD5: 9dc2e6fb92878163c4da2f95465aaa41 SHA-1: bfce57cb1d79c16d0b8166306b09d5ea86f8d976 SHA-256: ab4fe8b81a9b6af0841cdb3e37a96fb9e4dc8ab27fa976c541cc6dafe11740ed
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness. No scripts were extracted from this sample, and the document body was heavily obfuscated, preventing a more detailed analysis of the immediate user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://zacdsa.linkpc.net/6c55c53c52c53c58/Product-Management-by-Donald-R-Lehmann.pdf
    • http://zacdsa.linkpc.net/6c55c53c53c51c58/Lehmann-Toys-More-than-100-years-Lehmann-Spielzeug-by-Marianne-Cieslik.pdf
    • http://zacdsa.linkpc.net/6c55c53c52c50c51/The-Lehmann-Prins-Pirkei-Avoth-by-Marcus-Lehmann.pdf
    • http://zacdsa.linkpc.net/6c55c53c52c55c53/Aldred-Lehmann-Gemalde-by-Alfred-Lehmann.pdf
    • http://zacdsa.linkpc.net/7c52c54c50c51c56/Mastering-Information-Management-by-Donald-A-Marchand.pdf
    • http://zacdsa.linkpc.net/1c51c56c58c55c56c59/Supply-Chain-Logistics-Management-by-Donald-Closs-Bowersox.pdf
    • http://zacdsa.linkpc.net/1c50c55c53c53c56c55/Ethics-Management-for-Public-Administrators-Building-Organizations-of-Integrity-by-Donald-C-Menzel.pdf
    • http://zacdsa.linkpc.net/6c55c53c51c59c59/Darren-Lehmann-Worth-The-Wait-An-Autobiography-by-Darren-Lehmann.pdf
    • http://zacdsa.linkpc.net/9c57c51c51c56c52/Production-And-Operations-Management-Dryden-Press-Series-In-Management-Science-And-Quantitative-M-by-Norman-Gaither.pdf
    • http://zacdsa.linkpc.net/1c50c53c54c56c56c51/Investment-Management-Security-Analysis-and-Portfolio-Management-by-V-K-Bhalla.pdf
    • http://zacdsa.linkpc.net/1c50c56c52c57c54c51/Designing-for-Eartquakes-A-Manual-for-Architects-Fema-454-December-2006-Risk-Management-Series-by-Federal-Emergency-Management-Agency.pdf
    • http://zacdsa.linkpc.net/1c50c55c54c53c59c51/FEMA-455-Handbook-for-Rapid-Visual-Screening-of-Buildings-to-Evaluate-Terrorism-Risks-Risk-Management-Series-by-Federal-Emergency-Management-Agency.pdf
    • http://zacdsa.linkpc.net/6c55c53c51c51c54/You-Could-Do-Better-by-Stephanie-Lehmann.pdf
    • http://zacdsa.linkpc.net/7c50c52c50c59c59/CAD-Tools-and-Algorithms-for-Product-Design-by-Pere-Brunet.pdf
    • http://zacdsa.linkpc.net/4c54c50c50c52c57/Meet-Mr-Product-The-Art-of-the-Advertising-Character-by-Warren-Dotz.pdf
    • http://zacdsa.linkpc.net/2c57c52c52c50c54/The-Product-Manager-s-Desk-Reference-by-Steven-Haines.pdf
    • http://zacdsa.linkpc.net/5c55c58c57c50c53/Technical-Communication-Process-and-Product-by-Sharon-Gerson.pdf
    • http://zacdsa.linkpc.net/1c50c57c59c58c55c53/Water-Policy-and-Management-Solving-the-Problems---Proceedings-of-the-21st-Annual-Conference-Sponsored-by-the-Water-Resources-Planning-and-Management-Held-in-Denver-Colorado-May-23-26-1994-by-Harry-Tuvel.pdf
    • http://zacdsa.linkpc.net/6c55c53c51c58c57/How-to-Sing-by-Lilli-Lehmann.pdf
    • http://zacdsa.linkpc.net/2c54c53c55c51c59/Between-the-Crackups-by-Rebecca-Lehmann.pdf
    • http://zacdsa.linkpc.net/9c57c51c51c56c52/Production-And-Operations-Management-Dryden-Press-Series-In-Management-Science-And-Quantitat

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