Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed05f3f13ab9b78…

MALICIOUS

PDF

15.1 KB Created: 2019-05-07 04:35:40 +01:00 Authoring application: mPDF 5.7
MD5: 0641f3a2956b2071b5189d7ee62d442c SHA-1: d02981be728f14bb3b8f8ddc56123ed67de7b8e2 SHA-256: 8ed05f3f13ab9b78c959fefcbb1c0f251e8bd22ab94587b7226ca9eb4dafb542
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF documents. This technique is often used for SEO spam or to distribute malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, preventing a deeper analysis of its specific intent beyond the link farm.

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://muicuiu.dumb1.com/1a04a04a05a04a01/Second-Grave-on-the-Left-Charley-Davidson-2-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/4a08a09a03a08a00/Second-Grave-on-the-Left-Charley-Davidson-2-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/3a06a03a08a02a06/Second-Grave-on-the-Left-Charley-Davidson-2-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/2a06a02a06a05a04/First-Grave-on-the-Right-Charley-Davidson-1-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/3a08a01a05a04a02/First-Grave-on-the-Right-Charley-Davidson-1-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/2a06a03a05a08a06/First-Grave-on-the-Right-Charley-Davidson-1-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/3a04a01a08/The-Curse-of-Tenth-Grave-Charley-Davidson-10-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/4a08a09a07a05a04/Fifth-Grave-Past-the-Light-Charley-Davidson-5-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/8a04a01/Eighth-Grave-After-Dark-Charley-Davidson-8-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/3a04a01a09a03a05/Fifth-Grave-Past-the-Light-Charley-Davidson-5-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/8a03a06a04a09/Sixth-Grave-on-the-Edge-Charley-Davidson-6-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/2a04a02a06/The-Dirt-on-Ninth-Grave-Charley-Davidson-9-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/8a07a03a01a02/Third-Grave-Dead-Ahead-Charley-Davidson-3-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/5a00a05a03a05a08/Eleventh-Grave-in-Moonlight-Charley-Davidson-11-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/3a04a02a01a05a07/Seventh-Grave-and-No-Body-Charley-Davidson-7-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/3a05a09a05a01a02/Fourth-Grave-Beneath-My-Feet-Charley-Davidson-4-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/1a05a09a04a03a09/Fourth-Grave-Beneath-My-Feet-Charley-Davidson-4-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/5a00a05a01a04a08/Seventh-Grave-and-No-Body-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/4a04a08a00a09a03/Fourth-Grave-Beneath-My-Feet-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/3a02a03a01a00a05/Death-and-the-Girl-Next-Door-Darklight-1-by-Darynda-Jones.pdf
    • http://muicuiu.dumb1.com/3a04a01a09a03a05/Fifth-Grave-Past-the-Light-Charley-Davidson-5-by-Daryn

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