Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c86a9d4efc8231…

MALICIOUS

PDF

14.0 KB Created: 2019-04-30 02:57:29 +01:00 Authoring application: mPDF 5.7
MD5: bb2766c486534d5ad1846f0b5090371a SHA-1: 414429432ad6dbab331240667518e23832d0e450 SHA-256: e2c86a9d4efc82313d764a0a5e0ee5441c43986989cfee9b07c47d76267ebf6e
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 other PDF documents, a technique 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, making it difficult to determine the exact payload or intent beyond the link farm. The primary attack pattern observed is the distribution of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9200

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/3092095093097094/Screenplays-by-Stephen-King-Rose-Red-Kingdom-Hospital-Creepshow-the-Stand-Children-of-the-Corn-Cat-s-Eye-Pet-Sematary-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/1091095098098095090/STEPHEN-KING-NEW-COVER-SERIES-No-10-JOYLAND-ILLUSTRATED---1-500-by-Stephen-King-based-on-a-book-by-.pdf
    • http://loaminoo.linkpc.net/6092092091092099/Dolores-Claiborne-Nightmares-and-Dreamscapes-Stephen-King-11-2-boxed-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/4092091090094099/Stephen-King-Goes-to-the-Movies-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/6097094094093091/King-Goes-to-the-Movies-Vijf-verfilmde-verhalen-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/8094097099091/11-22-63-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/4094091099094/11-22-63-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/4096095092093/UR-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/4096094093095099/11-22-63-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/4099090094091096/UR-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/9096092096/11-22-63-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/2093090091097091/Pet-Sematary-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/2091092093092093/-Salem-s-Lot-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/3094096099091094/Insomnia-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/8093097092096/Joyland-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/4096097098097097/Under-the-Dome-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/5092096099092097/Mobiel-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/3095091091095098/Misery-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/3092096095093097/Beachworld-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/4099090093092099/Revival-by-Stephen-King.pdf
    • http://loaminoo.linkpc.net/4099090094091096/UR-by-Step

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