Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a2e802c8d23806…

MALICIOUS

PDF

62.3 KB Created: 2021-08-26 13:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: da271277877cd4713abc4e0534e16b6b SHA-1: d33293e55e11bde4e20ee9202cd2bfa5437a1b58 SHA-256: b6a2e802c8d238067be4d71677cff7e89a024b26a3aeb8c50bad96b794e1d8ee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm to distribute phishing or malware. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8949

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://pistant.ru/uplcv?utm_term=2+types+of+catalyst PDF link annotation
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/3f661df842dc1290f953de02bd9dd922/53653032185.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/46820835827.pdfIn PDF document text
    • http://esistore.lu/userfiles/file/47279364180.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073b770177d4---zivixos.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/85ee6e7e8208ef92b3a955272653ebd2/wojezerozozafofitivexa.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/04d7a3045844b8e4fb612ba5ccec9703/88717448627.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/xawiliza.pdfIn PDF document text
    • http://elm3rad.com/file/19732524162.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/fuzura.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/73077077512.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/ohq156usdofvqnmkqf4veskjrf/95248164282.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16071c35e80e5f---60151244105.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/f8b9b3b24555d92d260e58a971d36665/jixekuvutijakufol.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/68504339333.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd458a757f---napovozazipavunepaga.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/qi9kp97ck1rif7i929j38gmeii/gosolapapolizetuvejuwote.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/82015883134.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/1rck1d2ffn8taou7b4jecdj1lb/95278598617.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/dimenozobapokotus.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e293cf78364---wobifiligigujuvofimizakif.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/jumewafapade.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/20565346008.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d62d71ef8b1---81346104506.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/voguzawulijazonoli.pdfIn PDF document text

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