Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b9d3540b7e4b66…

MALICIOUS

PDF

52.4 KB Created: 2021-07-28 02:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a8c111ae8e419dfd21e49539eca63145 SHA-1: 44fae847cda4b44b0ba3f5245e26ee0e3c8b2266 SHA-256: 68b9d3540b7e4b66d98658765baff04fa1a406801dca108c1162083ea885d90b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing multiple links to external websites, many of which are hosted on compromised CMS platforms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6164

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://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/rhpagh0tg033oarm0d7vu53lf9/10225115312.pdf In PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/he7kr3ofj99n8lvhlnav88t2e4/36069281120.pdfIn PDF document text
    • http://pettwayfamilyreunion.com/clients/39389/File/zegewebujefenonurunij.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/50cfc1e6bd4e4062724a777e417866e7/79180318359.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/bimij.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/2b34f129b2d48ecc776db681cfe26bad/mojuvebasinesetepezexusun.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/nununolomemasake.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d187ac78c---satubapodiwikon.pdfIn PDF document text
    • https://tavio.ru/files/file/jevul.pdfIn PDF document text
    • http://chickenwild.com/upload/contents/images/images/pubuvegewokujeto.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/38889063842.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081c4cf46be4---63234160283.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/bec31a82c93dd117d8605e1c44fbcc31/71893329294.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/e7f8443e5bd875308a558aad61c9350a/98095315200.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/93053927520.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16095d7899da46---bubixuvavavesaduzoj.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985f533a310---bepimoruvi.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/24051518505.pdfIn PDF document text
    • http://baongochoa.com/upload/file/napibuvisiwikolot.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/52490339944.pdfIn PDF document text
    • https://mides.vn/images/ckeditor/files/xuluwuruwaru.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/52221544755.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7c5323340---depazobawisezum.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ee1f819ce---lolafuti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=what+is+meant+by+diaphoresis+in+medicalPDF link annotation

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