Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed17a2f0fc5f8c9a…

MALICIOUS

PDF

56.1 KB Created: 2021-09-24 16:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 343f6aaecca6faccab31d0420f7e93e2 SHA-1: 0feff4f1f4e7c70b24064af2f71e3020df811b10 SHA-256: ed17a2f0fc5f8c9a2c3d189c42aa0484513c79fb7896b0bc4e1ff916171811b9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm configuration. The presence of external URIs and the link farm structure suggest the primary purpose is to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8545

Heuristics 4

  • 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.
  • 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://ketchas.ru/uplcv?utm_term=nejlep%C5%A1%C3%AD+p%C5%99edpov%C4%9B%C4%8F+po%C4%8Das%C3%AD+pro+android PDF link annotation
    • https://hoalavender.net/upload/files/libisag.pdfIn PDF document text
    • http://kerekagy.hu/UserFiles/file/8186709899.pdfIn PDF document text
    • https://digireg.se/upload/44921029226.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/diminibumebaxu.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/32223548339.pdfIn PDF document text
    • http://grandfiltr.com/files/file/31044598143.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/gubelutipusare.pdfIn PDF document text
    • http://namlinhchisapa.com/userfiles/image/file/rafomisuxuvevit.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/vovijujodedesudutu.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/161408f7646693---nemotipafejuzerapogu.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/nilaxufurexojer.pdfIn PDF document text
    • http://eurosolar.cz/res/file/83567400646.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/99488132003.pdfIn PDF document text
    • http://kxxbs.com/uploadfiles/file/a/67357364972.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/43906345285.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/74337407855.pdfIn PDF document text
    • http://www.singchai.co.th/ckfinder/userfiles/files/karalarenipejebelur.pdfIn PDF document text
    • http://tnmetalworks.com/images/files/74788014783.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/83786539888.pdfIn PDF document text
    • http://pmke.cz/pictures/files/22144035121.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/7308527522.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/vevogofigenije.pdfIn PDF document text
    • http://mtsp.by/userfiles/files/88472192017.pdfIn PDF document text