Malicious PDF — malware analysis report

Static analysis result for SHA-256 27df20ce05f7ebb5…

MALICIOUS

PDF

53.3 KB Created: 2021-09-16 09:34:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2929e2fbfb13f0c16b682e1b97e82726 SHA-1: 564e8c8da09cea074da235619df694951acd8c1a SHA-256: 27df20ce05f7ebb5e0c708384ef91e191697bea7817bcb90c6c59260563e26a5
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 WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6499

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://krisoc.ru/uplcv?utm_term=convert+mp4+to+mp3+free+download+online
    • http://najlepsietorty.sk/uploads/fck/file/11596717245.pdf
    • http://toyotaquangninh.org/data/dulieu/files/mixekelep.pdf
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/37784987283.pdf
    • http://paradisoseminatrici.it/userfiles/files/pazutun.pdf
    • http://movesearchesuk.com/userfiles/file/bibinupirupimonowifo.pdf
    • http://innotack.com/userfiles/files/kolifojesixuninepazi.pdf
    • https://alwillislifecenter.org/ckfinder/userfiles/files/mezutorumegawamafapina.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/2cf15f46e79a7a05dd1824c893f4f8b6/mufunewege.pdf
    • http://raylutickenterprises.com/userfiles/files/73927111400.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e998487a9---18367183879.pdf
    • http://storemisr.com/uploads/files/34054504850.pdf
    • https://songhong.info/userfiles/file/68106730648.pdf
    • http://flomojapan.com/upload/files/21545821277.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/0pmsaj42q4ns99s0n9b8ktp3f3/47540597029.pdf
    • http://knupress.com/pds/editor/file/22501459977.pdf
    • http://sino-web.net/filespath/files/20210902090514.pdf
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/bojepipesusit.pdf
    • https://carrieres-pierre.com/userfiles/file/ralumifemawodogu.pdf
    • http://dinskayarealty.ru/media/file/wekef.pdf
    • https://thehouseproduction.net/file/zaguwovuzojigidananefo.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/231f44c22709a0e9dff63706a0aec598/runix.pdf
    • http://aqua4you.hu/userfiles/file/pejojoxewekokewubawugupa.pdf

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