Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa84a404ca128ac5…

MALICIOUS

PDF

17.1 KB Created: 2019-05-01 20:07:18 +01:00 Authoring application: mPDF 5.7 First seen: 2021-06-13
MD5: 8b36abf0af22f29896eda7a6de9684ac SHA-1: 81cbc9e8c2963c093443006a4bab81ec35a3c877 SHA-256: aa84a404ca128ac5b6452d1749fb8bd6c140bec308565ed870eb39d56e154701
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files hosted on a dynamic DNS domain, identified as a 'PDF_SEO_LINK_FARM' heuristic. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the structure and embedded links suggest an attempt to direct users to potentially malicious or SEO-manipulated content, possibly as a lure or to distribute further 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/6095092091096098/L-ducation-sentimentale-by-Candide-amp-Cyrano.pdf In PDF document text
    • http://loaminoo.linkpc.net/6095092091097091/A-Comparison-Between-the-Cyrano-of-Rostand-s-Drama-Cyrano-de-Bergerac-and-the-Real-Cyrano-in-Regard-to-Historical-Data-General-Characteristics-and-References-Made-to-the-Works-of-Cyrano---Scholar-s-Choice-Edition-by-David-Nelson-Inglis.pdfIn PDF document text
    • http://loaminoo.linkpc.net/7090093095094092/L-arte-come-educazione-sentimentale-by-Marco-Dallari.pdfIn PDF document text
    • http://loaminoo.linkpc.net/7090093096095097/Berlino-Una-guida-sentimentale-by-Frabasile-Renato.pdfIn PDF document text
    • http://loaminoo.linkpc.net/7090090098098099/Le-Chasseur-an-Chien-d-Arr-t-Contenant-Les-Habitudes-Les-Ruses-Du-Gibier-l-Art-de-Le-Chercher-Et-de-Le-Tirer-Le-Choix-Des-Armes-l-ducation-Des-Chiens-Leurs-Maladies-Etc-by-Elz-ar-Blaze.pdfIn PDF document text
    • http://loaminoo.linkpc.net/6095092090090096/Suns-and-Roses-by-Cyrano.pdfIn PDF document text
    • http://loaminoo.linkpc.net/6095091099099098/Cyrano-by-Tony-Stowers.pdfIn PDF document text
    • http://loaminoo.linkpc.net/6095092090090091/Cyrano-and-the-Nose-by-Scholastic-Inc-.pdfIn PDF document text
    • http://loaminoo.linkpc.net/6095092090090092/Cyrano-the-Crow-by-Don-Freeman.pdfIn PDF document text
    • http://loaminoo.linkpc.net/6095091099099090/Cyrano-the-Bear-by-Nicole-Rubel.pdfIn PDF document text
    • http://loaminoo.linkpc.net/6095092091092094/Cyrano-de-Bergerac-by-Carl-Foreman.pdfIn PDF document text
    • http://loaminoo.linkpc.net/6096096092093092/La-Mort-D-Agrippine-by-Cyrano-de-Bergerac.pdfIn PDF document text
    • http://loaminoo.linkpc.net/6095092090090098/Cyrano-De-Bergerac-by-Benjamin-Ivry.pdfIn PDF document text
    • http://loaminoo.linkpc.net/4094091098094097/Candide-by-Voltaire.pdfIn PDF document text
    • http://loaminoo.linkpc.net/5098098091090095/Candide-by-Voltaire.pdfIn PDF document text
    • http://loaminoo.linkpc.net/5095095090099097/Candide-by-Voltaire.pdfIn PDF document text
    • http://loaminoo.linkpc.net/2097091095091094/Candide-by-Voltaire.pdfIn PDF document text
    • http://loaminoo.linkpc.net/5096093092092097/Candide-by-Voltaire.pdfIn PDF document text
    • http://loaminoo.linkpc.net/9096092091094093/Candide-by-Voltaire.pdfIn PDF document text
    • http://loaminoo.linkpc.net/3094099091092096/Candide-by-Voltaire.pdfIn PDF document text

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