Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e47aef18b349c42…

MALICIOUS

PDF

73.7 KB Created: 2021-09-21 18:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 5b9116b320627c5e3031d0ac2cdd03c4 SHA-1: 21a5847ca1f5c80bf1103daaa65f8d8411df296d SHA-256: 2e47aef18b349c42fc2799a182010bbc64b935a15ab9b5e9b17fe2e53858dabf
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and flagged by an ML classifier. It contains embedded JavaScript and a large number of external URIs, many hosted on disposable domains, indicating a likely phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a link farm designed to obscure malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6879

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://smidgel.ru/uplcv?utm_term=anubhav+movie+old PDF link annotation
    • https://francoisdaulte.com/ckfinder/userfiles/files/20185503374.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/lusitavebanoponanuvabog.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/sopodu.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/naboguxamofajabu.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202109020609259705.pdfIn PDF document text
    • http://pribatu.lamilagrosaimport.com/images/files/98970320152.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/69810318965.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/38344242665.pdfIn PDF document text
    • http://homokkepek.hu/editor_up/pazimolaxagux.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/30492056550.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a740c72cec---78512645715.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/94814524711.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/72527041409.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/wedagevepazex.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/sowexoluzubezigad.pdfIn PDF document text
    • https://www.nhabe.com.vn/ckfinder/userfiles/files/97589755500.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/niterevikododugejo.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/78685443162.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/7018407736.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/91388728321.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/mav0jr4irgg938gve97asq3a1b/21773905273.pdfIn PDF document text
    • http://adice-area.com/pictures/files/rufonaxoxebowoni.pdfIn PDF document text
    • https://www.posluh.hr/ckfinder/userfiles/files/kiraguj.pdfIn PDF document text