Malicious PDF — malware analysis report

Static analysis result for SHA-256 1992948bb53c144e…

MALICIOUS

PDF

28.0 KB Created: 2019-03-30 16:20:34 +00:00 Authoring application: mPDF 5.7
MD5: e670f1170ebfbc40b2fb88488e44c901 SHA-1: 1d5dbb47e8a944acdac7f877aaf8bca9648339d4 SHA-256: 1992948bb53c144ef68687bfdbd5c387106d6ac3aa3de5a8ac04d4f2953cbb3f
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, identified as a link farm, directing users to external PDF files. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests that the document text may have been manipulated to include commands or URLs, potentially to trick users into clicking them. While no scripts were extracted, the overall structure and the presence of numerous external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://xiixmcuin.linkpc.net/1200203201209207200/Flora-Virginica-Exhibens-Plantas-Quas-V-C-Johannes-Clayton-in-Virginia-Observavit-Atque-Collegit-Easdem-Methodo-Sexuali-Disposuit-Ad-Genera-Propria-Retulit-Nominibus-Specificis-Insignivit-amp-Minus-Cognitas-Descripsit-Joh-Fred-Gronovius-by-Joh-Fred-Gronovius.pdf
    • http://xiixmcuin.linkpc.net/1200203201209207201/Flora-Virginica-Exhibens-Plantas-Quas-V-C-Johannes-Clayton-in-Virginia-Observavit-Atque-Collegit-Vol-1-Easdem-Methodo-Sexuali-Disposuit-Ad-Genera-Propria-Retulit-Nominibus-Specificis-Insignivit-Et-Minus-Cognitas-Descripsit-by-Johannes-Fredericus-Gronovius.pdf
    • http://xiixmcuin.linkpc.net/5207208203202/Living-With-Fred-The-Fred-Books-2-by-Brad-Whittington.pdf
    • http://xiixmcuin.linkpc.net/4209206205207208/Hit-Me-Fred-Recollections-of-a-Sideman-by-Fred-Wesley.pdf
    • http://xiixmcuin.linkpc.net/9206209203208203/Internet-Success-with-Fred-by-Fred-Klopfer.pdf
    • http://xiixmcuin.linkpc.net/5207201203205/Welcome-to-Fred-The-Fred-Books-1-by-Brad-Whittington.pdf
    • http://xiixmcuin.linkpc.net/2201205206207209/Fred-And-Rose-The-Full-Story-of-Fred-and-Rose-West-and-the-Gloucester-House-of-Horrors-by-Howard-Sounes.pdf
    • http://xiixmcuin.linkpc.net/9208207208207/Dr-Fred-s-Healthcare-Rescue-The-Real-Solution-to-Healthcare-by-Fred-F-Hollingsworth.pdf
    • http://xiixmcuin.linkpc.net/1200203201209206208/Florae-Romanae-Prodromus-Exhibens-Centurias-XII-Plantarum-Circa-Roman-Et-in-Cisapenninis-Pontificiae-Ditionis-Provinciis-Sponte-Nascentium-Sexuali-Systemate-Digestas-by-Antonio-Sebastiani.pdf
    • http://xiixmcuin.linkpc.net/6208203204209204/Synopsis-Plantarum-quatoriensium-Vol-1-Exhibens-Plantas-Praecipue-in-Regione-Temperata-Et-Frigida-Crescentes-Secundum-Systematam-Naturalem-Descriptas-Viribus-Medicatis-Et-Usibus-Oeconomicis-Plurimarum-Adjectis-by-William-Jameson.pdf
    • http://xiixmcuin.linkpc.net/7205208203201204/Fred-Manuele-on-Safety-Management-A-Collection-from-Professional-Safety-by-Fred-A-Manuele.pdf
    • http://xiixmcuin.linkpc.net/5208205200206205/Fred-Vargas-Books-2017-Checklist-Reading-Order-of-Commissaire-Adamsberg-Series-Three-Evangelists-Series-and-List-of-All-Fred-Vargas-Books-by-Platinum-List.pdf
    • http://xiixmcuin.linkpc.net/1201208202209200/Fred-Herzog-Photographs-by-Fred-Herzog.pdf
    • http://xiixmcuin.linkpc.net/1207200206207204/DJ-Fred-by-E-J-Benard.pdf
    • http://xiixmcuin.linkpc.net/4207205208207204/Much-Ado-About-Me-by-Fred-Allen.pdf
    • http://xiixmcuin.linkpc.net/5202204204204208/Flexible-Fred-by-Lee-McCaulla.pdf
    • http://xiixmcuin.linkpc.net/3204201208202202/Last-of-the-Curlews-by-Fred-Bodsworth.pdf
    • http://xiixmcuin.linkpc.net/9206207203209209/Old-Yeller-by-Fred-Gipson.pdf
    • http://xiixmcuin.linkpc.net/4200205205203203/Who-By-Fire-by-Fred-Stenson.pdf
    • http://xiixmcuin.linkpc.net/1201200205209209204/B-Jenkins-by-Fred-Moten.pdf
    • http://xiixmcuin.linkpc.net/

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