Malicious PDF — malware analysis report

Static analysis result for SHA-256 db1eb5e8850bbd06…

MALICIOUS

PDF

16.1 KB Created: 2019-05-01 19:05:50 +01:00 Authoring application: mPDF 5.7
MD5: b66458d7bf6f36f59e478103dedf97ce SHA-1: 9073b2d6108c692c2af56b524b56490d4a53fd96 SHA-256: db1eb5e8850bbd0609bee5df9050b069f7ef28de3e22ab203d7f44083bc4d71e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. While the specific intent of these links is unclear due to the benign reputation of the first few, the sheer volume suggests a link farm or a distribution point for further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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/4093093092099095/Be-Nice-Or-Else-and-what-s-in-it-for-you-by-Winn-Claybaugh.pdf
    • http://loaminoo.linkpc.net/6095094092092095/Nice-To-See-It-To-See-It-Nice-Bk-4-The-1970s-In-Front-Of-The-Telly-by-Brian-Viner.pdf
    • http://loaminoo.linkpc.net/3092099091098099/Suki-by-C-F-Winn.pdf
    • http://loaminoo.linkpc.net/3090099096092092/Visitations-by-P-S-Winn.pdf
    • http://loaminoo.linkpc.net/1092099093094093/Voices-by-P-S-Winn.pdf
    • http://loaminoo.linkpc.net/1093090099090098/Suppression-by-P-S-Winn.pdf
    • http://loaminoo.linkpc.net/2095093094091099/Pretty-Girls-by-Tony-J-Winn.pdf
    • http://loaminoo.linkpc.net/1093090098099/Because-of-Winn-Dixie-by-Kate-DiCamillo.pdf
    • http://loaminoo.linkpc.net/4093097092095093/The-Techno-Pagan-Octopus-Messiah-by-Ian-Winn.pdf
    • http://loaminoo.linkpc.net/1093094095093096/Time-of-My-Life-by-Allison-Winn-Scotch.pdf
    • http://loaminoo.linkpc.net/1098090099094094/The-Lost-Castle-Treasure-Sir-Kaye-the-Boy-Knight-2-by-Don-M-Winn.pdf
    • http://loaminoo.linkpc.net/2093090091090097/The-Department-of-Lost-amp-Found-by-Allison-Winn-Scotch.pdf
    • http://loaminoo.linkpc.net/9098091096090097/Chicagoland-Festivals-and-Events-Calendar-by-Winn-Krafton.pdf
    • http://loaminoo.linkpc.net/5090090090093099/Weavers-of-Revolution-The-Yarur-Workers-and-Chile-s-Road-to-Socialism-by-Peter-Winn.pdf
    • http://loaminoo.linkpc.net/2090098095095091/EcoArt-Earth-Friendly-Art-and-Craft-Experiences-for-3-To-9-Year-Olds-by-Laurie-Winn-Carlson.pdf
    • http://loaminoo.linkpc.net/3099099092095090/Twitch-the-Squirrel-and-the-Forbidden-Bridge-A-Kids-Book-about-Squirrels-Safety-Respect-and-Listening-Skills-by-Don-M-Winn.pdf
    • http://loaminoo.linkpc.net/4090090091091095/Shelby-the-Cat-A-Kids-Book-about-Bullying-and-How-to-Help-Kids-Build-Confidence-about-Peer-Pressure-by-Don-M-Winn.pdf
    • http://loaminoo.linkpc.net/1097090096099/Nice-by-Jen-Sacks.pdf
    • http://loaminoo.linkpc.net/2094092095099098/Not-So-Nice-Guy-by-R-S-Grey.pdf
    • http://loaminoo.linkpc.net/7096097096097091/Nice-One-Sniff-by-Ian-Whybrow.pdf

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