Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b99b3e109f5480c…

MALICIOUS

PDF

72.0 KB Created: 2021-06-29 00:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f9b1fdbf03f47d5588e813a4d06b5ad0 SHA-1: 796ffeb97af6952390036cf5a088ca7ea5f0e71d SHA-256: 3b99b3e109f5480c95e8ca5963aa8d94e8478a548267f3587034f181136a3555
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially disposable hosting. The presence of embedded URLs and the structure suggest an attempt to distribute malicious content or conduct phishing operations, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6468

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 http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec85657992---18536065002.pdf In PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/64f35ed3db13df15584989d1354e73c5/jamaluzu.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/31086655642.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607c51295b04e---zijexekerovuxozi.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/7c734d28747881375658e7db1c319b23/kaworabutas.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/bozurofemowapiguruwiv.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/7500187394.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb4abd81e6---2723304438.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/0c4bb47a8a32ff8b2dbe03b0998578b4/dosirigajetodonakotupijig.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/65298017074.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/28c39cb19ac07eb37bbfd2c527729f11/duziv.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/23403249943.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/34693025488.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a82d1973f---tefimixof.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/de37289942c0718f8faa6563e88add13/bedirakeg.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/86615527920.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/7gj00bpf723riov5ejfstj8r96/85449104025.pdfIn PDF document text
    • http://abwva.com/uploads/files/rikitoguxutefikoxu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607d34bc54015---tozazazaf.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/69439479892.pdfIn PDF document text
    • http://broadmoor79.com/clients/864886/File/kapaxezirikop.pdfIn PDF document text
    • http://tktravel.shop/FileData/ckfinder/files/20210622_1031AE4C06649BC0.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=peter+crouch+englandPDF link annotation

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