Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd5930fe35fe643…

MALICIOUS

PDF

47.4 KB Created: 2021-09-14 01:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f8a61762bba89c49ca6f9aba1a559b9f SHA-1: 17aec09b3ee8e05fcdc149ace034683b0bc10d28 SHA-256: 0bd5930fe35fe6437acac189db63407d940308e83bdbe125c1826b3ecd58cf72
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm or redirection service. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document's structure as a non-clustered link farm on disposable hosting, reinforcing the phishing or malware distribution vector. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6646

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://synerhu.ru/uplcv?utm_term=telegram+app+download+apk+for+pc PDF link annotation
    • http://alexlunacoach.com/img/editor/file/25738275929.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/13464385048.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/93886743139.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/65812163724.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/mabigeviwam.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/20294962687.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210914_D6E414D218C24C12.pdfIn PDF document text
    • http://reliancefla.com/admin/images/file/kobefekexu.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/gufafexaralibodigeru.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/vewevamajubuwedusoduw.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/77227557207.pdfIn PDF document text
    • https://afritransport.com/app/webroot/files/file/gubixe.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/68206363103.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/xanekurizoxe.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/zizedafejitewamid.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/61667257718.pdfIn PDF document text
    • http://caythuocnam.org/images/files/lerov.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/jowegaxe.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/17742140146.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/81689329313.pdfIn PDF document text
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/bumilevol.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/46824758501.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/23762009798.pdfIn PDF document text
    • http://imaginove.eu/data/Files/4558097182.pdfIn PDF document text