Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3533f489ef8ee7f…

MALICIOUS

PDF

17.5 KB Created: 2019-04-30 03:50:22 +01:00 Authoring application: mPDF 5.7
MD5: c04029a271055a8b0385b0dae6b806f9 SHA-1: 79f1f57d9dc48d5cb079deaf426747e5973daf39 SHA-256: d3533f489ef8ee7f0ce09f97524808d320327fe1e3bec5f7f0bb885a78e7ee8d
90 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the sheer volume of links and the heuristic firing suggest an attempt to manipulate search engine results or distribute further malicious content. The primary IOCs are the embedded URLs, which are likely used to host or redirect to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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/5097090095090093/The-dark-Lord-Dungeon-Monstres-2-by-Joann-Sfar.pdf
    • http://loaminoo.linkpc.net/4094091092092098/Dungeon-Zenith---Vol-1-Duck-Heart-by-Joann-Sfar.pdf
    • http://loaminoo.linkpc.net/2094095095099091/Little-Vampire-by-Joann-Sfar.pdf
    • http://loaminoo.linkpc.net/1090091096098090099/The-Little-Prince-Graphic-Novel-by-Joann-Sfar.pdf
    • http://loaminoo.linkpc.net/8093097091093091/Le-Plus-grand-philosophe-de-France-by-Joann-Sfar.pdf
    • http://loaminoo.linkpc.net/5092098096099093/The-Little-Prince-A-Graphic-Novel-Adaptation-by-Joann-Sfar.pdf
    • http://loaminoo.linkpc.net/2091098099094094/Vampire-Loves-Grand-Vampire-1-4-by-Joann-Sfar.pdf
    • http://loaminoo.linkpc.net/7095092095099091/Le-Chat-du-Rabbin-Tu-n-auras-pas-d-autre-dieu-que-moi-Le-Chat-du-Rabbin-6-by-Joann-Sfar.pdf
    • http://loaminoo.linkpc.net/4097097093094091/Dungeon-Lord-Otherworldly-Powers-The-Wraith-s-Haunt-2-by-Hugo-Huesca.pdf
    • http://loaminoo.linkpc.net/6096091092090093/Articles-on-French-Comics-Artists-Including-Enki-Bilal-Jacques-Tardi-R-GIS-Loisel-Joann-Sfar-Jean-Jacques-Semp-Jacques-Martin-Comics-Fran-OIS-Bourgeon-Jean-Graton-Emmanuel-Larcenet-David-Beauchard-Michel-Rodrigue-by-Hephaestus-Books.pdf
    • http://loaminoo.linkpc.net/9097099093091099/-4-Dungeon-Meshi-4-Delicious-in-Dungeon-4-by-Ryoko-Kui.pdf
    • http://loaminoo.linkpc.net/1096092097099091/Dungeon-Madness-The-Divine-Dungeon-2-by-Dakota-Krout.pdf
    • http://loaminoo.linkpc.net/9097099093092093/-5-Dungeon-Meshi-5-Delicious-in-Dungeon-5-by-Ryoko-Kui.pdf
    • http://loaminoo.linkpc.net/9097099093091094/-1-Dungeon-Meshi-1-Delicious-in-Dungeon-1-by-Ryoko-Kui.pdf
    • http://loaminoo.linkpc.net/1097091090095094/Dungeon-Games-Masters-and-Mercenaries-6-5-1001-Dark-Nights-5-by-Lexi-Blake.pdf
    • http://loaminoo.linkpc.net/2094093094095090/The-Dark-Lord-s-Handbook-The-Dark-Lord-s-Handbook-1-by-Paul-Dale.pdf
    • http://loaminoo.linkpc.net/1099092099095096/The-Eternal-Dungeon-Eternal-Dungeon-1-4-amp-side-novella-by-Dusk-Peterson.pdf
    • http://loaminoo.linkpc.net/5097090094098095/All-on-viuen-els-monstres-by-Maurice-Sendak.pdf
    • http://loaminoo.linkpc.net/6095091093095094/Retour-la-cit-des-monstres-by-Fr-d-ric-Soulier.pdf
    • http://loaminoo.linkpc.net/4091096094096091/The-Dark-Lord-and-the-Seamstress-by-J-M-Frey.pdf
    • http://loaminoo.linkpc.net/6096091092090093/Articles-on-French-Comics-Artists-Including-Enki-Bilal-Jacques-Tardi-R-GIS-Loisel-Joann-Sfar-Jean-Jacques-Se