Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb0f68d3ac8112f…

MALICIOUS

PDF

13.6 KB Created: 2019-05-07 04:19:08 +01:00 Authoring application: mPDF 5.7
MD5: 72296f077b5104471e5a26786fab3e97 SHA-1: fd2a9a6b0c74fee0ccbb36ef5f43163a376bb637 SHA-256: bfb0f68d3ac8112fc5602e24946b4b0ce62105b925cb588a89e2bfd4ac8d473f
90 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a large number of embedded links to external PDF files, indicating a link farm or redirection mechanism. The heuristic 'PDF_SEO_LINK_FARM' specifically identified 21 such links. While the document body is heavily obfuscated and unreadable, the presence of numerous external links suggests an attempt to lure users to potentially malicious websites or download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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/3a03a07a09a09a07/Keeper-of-my-Heart-by-Karie-Hendon.pdf
    • http://muicuiu.dumb1.com/1a07a09a02a06a08/Keeper-of-the-Golden-Dragon-s-Heart-Cedar-River-1-by-Gemma-K-Murray.pdf
    • http://muicuiu.dumb1.com/7a04a07a02a02a06/The-Keeper-s-Quest-The-Second-Book-in-the-Keeper-s-Deries-by-MR-Peter-Bolton.pdf
    • http://muicuiu.dumb1.com/5a01a03a07a01/Keeper-Keeper-Series-1-by-Robyn-Roze.pdf
    • http://muicuiu.dumb1.com/6a07a05a08a01a02/The-Crystal-Keeper-Crystal-Keeper-1-3-by-Laurisa-White-Reyes.pdf
    • http://muicuiu.dumb1.com/4a07a01a09a00a01/The-Secret-Keeper-Up-All-Night-The-Secret-Keeper-3-by-Brea-Brown.pdf
    • http://muicuiu.dumb1.com/3a07a00a05a00a01/The-New-Boy-by-Arielle-Pierce.pdf
    • http://muicuiu.dumb1.com/5a00a02a09a08a05/Amenhotep-III-by-Arielle-P-Kozloff.pdf
    • http://muicuiu.dumb1.com/7a00a01a03a06a07/Insured-For-Love-by-Arielle.pdf
    • http://muicuiu.dumb1.com/4a00a04a08a04a03/The-Secret-Keeper-The-Secret-Keeper-1-by-Brea-Brown.pdf
    • http://muicuiu.dumb1.com/3a00a02a05a03a06/Dragon-Keeper-Dragon-Keeper-1-by-Carole-Wilkinson.pdf
    • http://muicuiu.dumb1.com/3a09a08a02a01a07/Reclaiming-Souls-by-Arielle-Caldwell.pdf
    • http://muicuiu.dumb1.com/7a00a01a02a08a07/Fighting-for-Arielle-by-Karina-Sharp.pdf
    • http://muicuiu.dumb1.com/6a08a01a08a09a08/The-Faery-Reel-by-Arielle-Pierce.pdf
    • http://muicuiu.dumb1.com/3a00a00a00a09a04/Un-Common-Ground-by-Arielle-Pierce.pdf
    • http://muicuiu.dumb1.com/2a09a07a01a06a08/Kept-Arielle-Lockley-1-by-Elle-Field.pdf
    • http://muicuiu.dumb1.com/3a08a03a08a00a00/Lost-Arielle-Lockley-2-by-Elle-Field.pdf
    • http://muicuiu.dumb1.com/7a00a01a03a08a06/Found-Arielle-Lockley-3-by-Elle-Field.pdf
    • http://muicuiu.dumb1.com/7a00a01a03a09a06/The-Cherry-On-Top-Vegas-Firsts-1-by-Arielle-Hudson.pdf
    • http://muicuiu.dumb1.com/7a00a00a05a01a01/Giordano-Bruno-and-the-Geometry-of-Language-by-Arielle-Saiber.pdf
    • http://muicuiu.dumb1.com/3a09a08a02a01a07/Reclaimin

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