Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ab39a6f917c0f7…

MALICIOUS

PDF

46.8 KB Created: 2021-09-20 02:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 80687817b8e97e9df6e69b539a769575 SHA-1: e606bc83e2a3826fd9e0ff3ed7a7baa81543ce4a SHA-256: c9ab39a6f917c0f753039b7017f600879eabfbde9c125ba6744109b9a4bc7508
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting. The presence of JavaScript suggests an attempt to execute malicious code, likely to download further payloads or redirect the user to phishing sites. The numerous links and the 'link farm' heuristic indicate a strong intent to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5469

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://irlanc.ru/uplcv?utm_term=territory+war+unblocked PDF link annotation
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142111cd9955---lapipupigupivufutaxeli.pdfIn PDF document text
    • https://funbugs.ie/files/file/25248425472.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/5065d9299545e4513f524ef865d29295/vuzosevezesumazixanovit.pdfIn PDF document text
    • https://www.savininkai.lt/ckfinder/userfiles/files/fikokadigagef.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/51682757128.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/72781381557.pdfIn PDF document text
    • http://geraldinekilkelly.ie/fedowi.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/11441095576.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/31741607596.pdfIn PDF document text
    • https://repetitorebi.ge/userfiles/files/gogozoxuvel.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202109050422334801.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/65509132667.pdfIn PDF document text
    • http://manenshop.com/upload/files/86264861211.pdfIn PDF document text
    • http://hkalc.com/userfiles/nizulofubedasena.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/xaloroturasebirura.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/94749605287.pdfIn PDF document text
    • http://swotaweb.com/img/upload/file/47852093870.pdfIn PDF document text
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/22305393288.pdfIn PDF document text
    • http://braindevelopmentmaps-org.neurondevelopment.org/userfiles/files/84526280950.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210903145819.pdfIn PDF document text
    • http://ohmytour.kr/FileData/ckfinder/files/20210916_B9601714421EC476.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/86922702758.pdfIn PDF document text
    • http://hytechcommunications.com/userfiles/file/mibigawojexa.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/xeveje.pdfIn PDF document text

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