Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e17fc25773d014…

MALICIOUS

PDF

51.1 KB Created: 2021-10-15 16:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5167137df5af1c7ec201ef1fb49059d3 SHA-1: c124c44033c2e77626e755f30a8cda00a0f19ab5 SHA-256: 85e17fc25773d014d299330d3a06416477a3be2943b80ed7aa071af31a9da461
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier further indicate malicious intent. The primary function appears to be redirecting users to external sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6388

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://sharks-cz.cz/images/file/ruxiwuzamazeg.pdf In PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/xitotegetenapu.pdfIn PDF document text
    • http://setunari.com/uploads/news/2021/10/14/file/majerisimilisut.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615cc4435de0f---defedipuwumupemimasinugo.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/i792s8e19a8maeb0lgon8h94s6/gebixoluwilo.pdfIn PDF document text
    • http://all-premium.com/user_file/files/54437868603.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/bujubere.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/6257512254.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/408814950.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/95570114482.pdfIn PDF document text
    • https://go2germany.ru/files/file/74891090445.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/figefejatawakedej.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-09-19/images/files/21108369139.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/27909981973.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613676992094a---bapezegeb.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161628fa7db44b---figuzomunepimo.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/jijufanudewuxikisiw.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614af27ae31d0---vuririloxiguzoje.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/fufelovevekilawemipo.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/wuleto.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/2fmptueuq2losjrrtdjibanfl4/mogejag.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/fikoxutal.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/nimutigegupekuvetetiva.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/zorebipelepuradufovoripe.pdfIn PDF document text
    • https://guadix.co/ckfinder/userfiles/files/6072266342.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109302035232646.pdfIn PDF document text
    • http://kasand.com/userfiles/9676212996.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/D9plVHj2VOU/uplcv?utm_term=sample+emcee+script+for+7th+birthday+party+pdfPDF link annotation

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