Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0d5b7498a67f87…

MALICIOUS

PDF

56.7 KB Created: 2021-06-22 14:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0588234fb1d657bc487dbbff47a125ab SHA-1: 37bf0cd7917492f41daf3f242948fe07806e06a1 SHA-256: ee0d5b7498a67f877e8633f8245d735b160959a2057e56619f4aa3fb99dd6c48
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded links, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or tracking mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6277

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://queure.ru/uplcv?utm_term=21st+season+of+the+bachelor PDF link annotation
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa31d10ffb4---bonugod.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/rivenujerumolutodefezutew.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/63064dcfe1eebc2de5d93c794ae3b6dd/wekubirugupepujibo.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1621342823.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087294ddde89---zosof.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/kimuginexozoviwunadub.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3ef667a8e---ririgigito.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/36931260796.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/76421510729.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c5740b03b---dadovekog.pdfIn PDF document text
    • http://nessium.net/userfiles/file/tasazugisasusizidoxo.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/19f6e58657c220611b0a22f082729f32/nikosabov.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/3e8757fcd61eaf2fd1396ffb91d1ed0e/xanowavovamof.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0afaa7a9d---jagefodo.pdfIn PDF document text

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