Malicious PDF — malware analysis report

Static analysis result for SHA-256 24668256fdc0c960…

MALICIOUS

PDF

56.8 KB Created: 2021-09-01 01:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 362f8f1b7122aa0adb0306b64b1c8c61 SHA-1: f947a8a5b939c42739f3d89d229934755d58700b SHA-256: 24668256fdc0c96067833574c5f99539ab9282a05295aadba11b3116d20283f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm hosted on compromised WordPress sites, with numerous distinct hosts and URLs pointing to PDF files. The presence of external URIs and a link farm structure strongly suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9584

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 https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca2f45b8c44---96018857845.pdf In PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/genuvu.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d627e2f2569---50373583245.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/vuzodofonizumiv.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/87311994652.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/26018389673.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076e5d2a10bf---vemulomazozusedejufutufoz.pdfIn PDF document text
    • http://jogamiskolc.hu/ckfinder/userfiles/files/disofazifozewunaw.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/nuwiborijibovesukobim.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/42276614412.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/23967988911.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096aed653226---nisalufitugakuxotowepi.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/5e83b0c348b988a863e16d188154e868/kexivabefamajetaw.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b2928d66a2e---zuminarodatipelilovopujan.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/fudazekezelubitaj.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/cmlj606e6debehnlvvttav0rhg/dizewu.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106ed3881bfc---riwapisemad.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098299690586---12782851003.pdfIn PDF document text
    • http://mariancozma.com/_user/file/87820326659.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c256a1c2ab2---62702617905.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160983c0fb13bd---lokokarinuritepituwozo.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///mefidebokunuwomone.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/vurapezelelekufelotele.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=the+silent+companions+endingPDF link annotation

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