Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63e847ff2978140…

MALICIOUS

PDF

17.0 KB Created: 2019-05-01 18:28:37 +01:00 Authoring application: mPDF 5.7
MD5: 6399857eb6b7f3d28bb389b0b9d325de SHA-1: 453fda3c74ca6cb9aba8e9026fa8895916a9fad9 SHA-256: a63e847ff29781405564e41e38c7e5452dc02753dee2ce78344d5d6c4709748e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as a malicious PDF dropper by ClamAV. Static analysis revealed a link farm containing 23 external PDF links, predominantly hosted on 'loaminoo.linkpc.net'. These links appear to be SEO-optimized, suggesting a tactic to distribute or redirect users to potentially malicious content under the guise of legitimate book downloads. No scripts were extracted, and the document body was unreadable, but the PDF structure and link farm strongly indicate a malicious intent to redirect users.

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.
  • ClamAV: Pdf.Dropper.Agent-9526790-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9526790-0
  • 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/7092094090093096/The-Annotated-Treasure-Island-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/1090095096097093092/Treasure-Island-The-Classic-Collection-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/6099098095090094/The-Master-of-Ballantrae-Treasure-Island-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/5092093096090095/The-Spitting-Image-Treasure-Island-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/7092091097095096/Treasure-Island-The-Original-Illustrated-Version-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/5096099093092099/Treasure-Island-A-Story-of-the-Spanish-Main-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/5099092096095091/Treasure-Island---Special-Student-Edition-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/5095099094099090/Luke-Evans-Reads-Treasure-Island-Famous-Fiction-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/6099098095090099/Treasure-island-Kidnapped-Weir-of-Hermiston-The-master-of-Ballantrae-The-black-arrow-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/6098090091095090/L-le-au-Tr-sor-Treasure-Island-Bilingue-Collection-RLS-Bilingue-t-7-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/1091092096097090098/The-Master-of-Ballantrae-by-Robert-Louis-Stevenson-Unabridged-1889-Original-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/1090096098091091094/Kidnapped-By-Robert-Louis-Stevenson-Illustrated-FREE-Gulliver-s-Travels-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/6099098095091091/The-Master-of-Ballantrae-Robert-Louis-Stevenson-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/9091091099091094/The-Bottle-Imp-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/9099099092091098/Kidnapped-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/1098092098092090/Kidnapped-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/2099099093096099/The-Bottle-Imp-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/9098093099093091/The-Wrong-Box-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/3095098093098092/Kidnapped-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/4097094090098093/South-Sea-Tales-by-Robert-Louis-Stevenson.pdf
    • http://loaminoo.linkpc.net/6099098095090099/Treasur