Malicious PDF — malware analysis report

Static analysis result for SHA-256 091cb5280ad57e70…

MALICIOUS

PDF

15.0 KB Created: 2019-05-03 06:32:14 +01:00 Authoring application: mPDF 5.7
MD5: 309c9c00c2afce96a149064f573051e9 SHA-1: 469c7c3dceaed90d66a1be7eb31519b56071de12 SHA-256: 091cb5280ad57e70232522ad128383ec78af1a1564ee6d9b109d28a2ba552598
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, identified by the PDF_SEO_LINK_FARM heuristic. While the document body is heavily obfuscated, the presence of numerous links suggests an attempt to distribute content or potentially engage in SEO spam. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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/3a07a00a00a02a06/Edge-of-Desperation-Wielder-World-1-by-Nat-Kennedy.pdf
    • http://muicuiu.dumb1.com/7a00a05a00a01/Element-Wielder-The-Void-Wielder-Trilogy-1-by-Cesar-Gonzalez.pdf
    • http://muicuiu.dumb1.com/2a05a08a04a01a02/Wielder-s-Fate-Wielder-3-by-T-B-Christensen.pdf
    • http://muicuiu.dumb1.com/2a02a04a02a06a03/Leaving-the-World-by-Douglas-Kennedy.pdf
    • http://muicuiu.dumb1.com/3a00a09a01a09a06/At-the-Edge-of-the-World-by-L-C-Spoering.pdf
    • http://muicuiu.dumb1.com/1a00a06a06a04a05/Race-to-the-Edge-of-the-World-by-J-F-Wiegand.pdf
    • http://muicuiu.dumb1.com/8a01a06a03a08a09/On-the-Edge-of-the-World-by-Nikolai-Leskov.pdf
    • http://muicuiu.dumb1.com/1a01a00a04a00a01a09/the-peaks-at-the-edge-of-the-world-by-M-F-Erler.pdf
    • http://muicuiu.dumb1.com/1a03a06a04a01/Kennedy-Assassinated-The-World-Mourns-A-Reporter-s-Story-by-Wilborn-Hampton.pdf
    • http://muicuiu.dumb1.com/3a08a06a02a04a05/The-Edge-of-the-World-by-Jacynth-Hope-Simpson.pdf
    • http://muicuiu.dumb1.com/3a08a06a01a01a01/The-Edge-of-the-World-The-First-Americans-7-by-William-Sarabande.pdf
    • http://muicuiu.dumb1.com/2a02a03a07a02a05/A-Crack-in-the-Edge-of-the-World-by-Simon-Winchester.pdf
    • http://muicuiu.dumb1.com/3a08a00a06/To-The-Bright-Edge-of-the-World-by-Eowyn-Ivey.pdf
    • http://muicuiu.dumb1.com/2a00a01a06a06a02/World-s-Edge-Nightblade-2-by-Ryan-Kirk.pdf
    • http://muicuiu.dumb1.com/2a09a04a00a04a04/King-of-the-World-s-Edge-by-H-Warner-Munn.pdf
    • http://muicuiu.dumb1.com/1a08a07a00a04a00/The-Mysterious-Edge-of-the-Heroic-World-by-E-L-Konigsburg.pdf
    • http://muicuiu.dumb1.com/2a06a05a06a08/Desperation-by-Stephen-King.pdf
    • http://muicuiu.dumb1.com/2a02a08a01a03a08/The-Edge-of-the-World-Terra-Incognita-1-by-Kevin-J-Anderson.pdf
    • http://muicuiu.dumb1.com/2a09a02a08a02a04/War-at-the-Edge-of-the-World-Twilight-of-Empire-1-by-Ian-James-Ross.pdf
    • http://muicuiu.dumb1.com/2a01a05a08/My-Diary-from-the-Edge-of-the-World-by-Jodi-Lynn-Anderson.pdf

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