Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b400d547e839a5…

MALICIOUS

PDF

77.6 KB Created: 2021-06-27 14:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a96f920fb82e94aaca941edeefa9b32c SHA-1: a88d4fb9bd42fafb078270816efdc6359e909bf6 SHA-256: d6b400d547e839a5cbaa765bdbd24d0f677ef2d4618fa85a829542907d352e9a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the structure suggests it's intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6284

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://infrive.ru/uplcv?utm_term=class+12+physics+chapter+1+best+notes PDF link annotation
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/20876e52971393a5b52881643d9d2b98/14562429182.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/6455f9ca7bb3a86014bb93001f882cf6/48055194344.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d82981d63e---16958790981.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/sa43fmlg96h7ue1ob6ch5odthu/52618196315.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/5ec602d6323dd469049909797505b8f3/81838198143.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fc0cd5b81---23704337983.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947969684b9---zamomozigewukabisawaravej.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e78db6a5c9---xopoduduratakugu.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/7bb9b7350ce7e3193b0dc251a4c826be/18381058008.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/pibalas.pdfIn PDF document text
    • http://drive4smilesontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/83741908221.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/588cad228b7e448845ff167fabcb2568/jubesilujetutabusifimu.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/46414450966.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/46557420858.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160732416a579a---85795898041.pdfIn PDF document text
    • http://nature-revive.org/files/file/47183279546.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/76661466249.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/6ba9d547958bf45114fb055e2efd4c4b/74063410800.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/hb3ejimumo63mo7h44s2dmvbur/vedudevozika.pdfIn PDF document text
    • https://yocarbroker.com/upload/ckfinder/files/mobevipenu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4300d1863f---tapiwotezowum.pdfIn PDF document text
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/mapadabapimikelu.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/fosuvezegagaka.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bebe4edcb92---26425951409.pdfIn PDF document text
    • http://policylic.com/uploads/files/6969862630.pdfIn PDF document text

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