Malicious PDF — malware analysis report

Static analysis result for SHA-256 97794469b10d410e…

MALICIOUS

PDF

62.3 KB Created: 2021-06-21 04:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 34f4e955fa85e793e2887fbda0b8502d SHA-1: 9ccd886c8ca19bff043061f5d76e42e9afee87ed SHA-256: 97794469b10d410eff1ad33e473b77a3703730508c38f2d7837367843708ac0c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. ClamAV detection and ML classification confirm its malicious nature, likely as a phishing or malware distribution vector. No scripts were extracted, but the presence of external links indicates an attempt to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5420

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://crewmak.ru/uplcv?utm_term=logic+gate+laws PDF link annotation
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/1cn9ja401tfkvccmvnei4jjgm7/wavozegokopikivun.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/kizegewiwafubatuta.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9562696dd9---botizetudubemizew.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9617452a17d71a285cc9189fbf4d0722/16100957681.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/061ac0943cb136a727a63e98cef90101/nuripeturanogemi.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16098be105d4eb---93322186136.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e265087820---munukifedanewi.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608484adb7109---43707527507.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/jezenanotitaxixugodeweru.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089c8e7aa595---nopuwalosedomaru.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4ca1d86ab---68802412741.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/501417a1c5c7f98190bdbe27da71d107/jaxafakonogexapeneviragaz.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/vazuzajalexavi.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/35586497314.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b457f3ae42b---58050979063.pdfIn PDF document text

Related samples 8

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