Malicious PDF — malware analysis report

Static analysis result for SHA-256 a758a2c3be17cba8…

MALICIOUS

PDF

12.9 KB Created: 2019-04-30 19:20:33 +01:00 Authoring application: mPDF 5.7
MD5: c1b737cab4bdfb381edfa815060b5b2d SHA-1: a95ded715d0de2a6f6762db8c9ee2d0a957043ba SHA-256: a758a2c3be17cba830d41186313ad598dc15a93e74e939e5debf5084bbdb25cd
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. While the specific intent of these links is unclear from the provided data, the ML classifier flagged the PDF as malicious. No scripts were extracted from this sample. The primary IOCs are the numerous URLs embedded within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9006

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/6099096095097099/A-Roman-Rescue-K-A-Gerrard-by-Kelly-Gerrard.pdf
    • http://loaminoo.linkpc.net/3091094090096093/Not-a-Star-and-Otherwise-Pandemonium-Stories-by-Nick-Hornby.pdf
    • http://loaminoo.linkpc.net/1090096095092097094/Spicy-Slipstream-Stories-by-Nick-Mamatas.pdf
    • http://loaminoo.linkpc.net/3092095096096099/Not-a-Star-and-Otherwise-Pandemonium-Stories-by-Nick-Hornby.pdf
    • http://loaminoo.linkpc.net/4091098095095094/Billy-s-Turn-Rose-City-Stories-2-by-Nick-Pageant.pdf
    • http://loaminoo.linkpc.net/5095090092096095/Graffiti-Paris-by-Fabienne-Grevy.pdf
    • http://loaminoo.linkpc.net/9095090095098099/Graffiti-In-The-Moment-Vol-3-by-Hinoki-Kino.pdf
    • http://loaminoo.linkpc.net/3096091093094091/Blue-Graffiti-by-Dianne-Borsenik.pdf
    • http://loaminoo.linkpc.net/4091096095090092/Graffiti-on-the-Fence-by-Elaine-Forrestal.pdf
    • http://loaminoo.linkpc.net/4099092098093090/Arabic-Graffiti-by-Pascal-Zoghbi.pdf
    • http://loaminoo.linkpc.net/1091097092095099094/Graffiti-a-New-York-by-Andrea-Nelli.pdf
    • http://loaminoo.linkpc.net/9099091095091098/Der-Terraner-Graffiti-by-William-Voltz.pdf
    • http://loaminoo.linkpc.net/5090099095097/Graffiti-Hack-by-Elen-Ghulam.pdf
    • http://loaminoo.linkpc.net/6093093092091092/Graff-The-Art-amp-Technique-of-Graffiti-by-Scape-Martinez.pdf
    • http://loaminoo.linkpc.net/6093093092094097/Graff-2-Next-Level-Graffiti-Techniques-by-Scape-Martinez.pdf
    • http://loaminoo.linkpc.net/7094097099090091/World-Piecebook-Global-Graffiti-Drawings-by-Sacha-Jenkins.pdf
    • http://loaminoo.linkpc.net/6099096097098091/The-Favershams-by-Roy-Gerrard.pdf
    • http://loaminoo.linkpc.net/6099096097098092/Mik-s-Mammoth-by-Roy-Gerrard.pdf
    • http://loaminoo.linkpc.net/6099096095097094/Rosie-and-the-Rustlers-by-Roy-Gerrard.pdf
    • http://loaminoo.linkpc.net/2091095093094091/Solace-by-Nicci-Gerrard.pdf
    • http://loaminoo.linkpc.net/50900

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