Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9aedb765824b510…

MALICIOUS

PDF

128.0 KB Created: 2021-08-23 11:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 869f3cd6a1401c9134c2f3de5d18a8dd SHA-1: 8b53cc6796ca391160c860001e062de08fd3fd93 SHA-256: b9aedb765824b5104ea915acfe0a7052da78a414ae4a412eaa1a581840fe7702
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to websites hosted on compromised WordPress installations or other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware-hosting sites. The primary function appears to be a link farm designed to distribute traffic across various potentially malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9526

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://slp70.com/clients/873855/File/29919174264.pdf In PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/goxafa.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/c1e6edbae298d8e245f34079229914d5/kowider.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107be1292075.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c76acc3fd73---18557041992.pdfIn PDF document text
    • http://littlefreddieking.com/clients/65037/File/25217921270.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/nalumadepuja.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/sedisebara.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021072208252747.pdfIn PDF document text
    • http://preserveproperties.com/userfiles/files/tevubujisovewezigun.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents//files/gejizagibejovinixigux.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2c28c74db---kobekanoviwuvediw.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/tikotigepuzajuguvif.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/d9ek0u1hu94f5v6ij0da2dtji5/linudabo.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/92477298961.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/lagumijufusuxeveto.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/rajizotul.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16289044347729.pdfIn PDF document text
    • http://sartor.ru/upload/files/dezetaperewuvijeko.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/ba91613d30a6651abb0aacd1eb700058/66008229747.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/jomutasivitixi.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/2ecff1b4b2d3b0a1eca8c6c775f64bfa/84427356980.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/lilazesiwanuruk.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9f5c477f0---duselu.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/ieeem29rb9st5h1n1l7pidusmv/42513980883.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=predators+meaning+in+englishPDF link annotation

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