Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffbd1724f159c6d4…

MALICIOUS

PDF

166.4 KB Created: 2021-06-04 08:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 385cb6fd7db47404a4c428be5aad74e6 SHA-1: f7366f67ef176891e38dfb094425f72c432dd395 SHA-256: ffbd1724f159c6d4f64134d5eac6084e46e85595bd723934c02455323fa1d9ea
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to disposable hosting services, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links designed to appear legitimate but lead to potentially harmful sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further confirms the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7646

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cructi.ru/pbw?utm_term=solucionari+matem%25C3%25A0tiques+1+batxillerat+mc+graw+hill+2017 PDF link annotation
    • https://fomodaduvi.weebly.com/uploads/1/3/4/7/134700625/zisalosobuvobo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419640/normal_5fe8681ea27e0.pdfIn PDF document text
    • https://mepaxekedin.weebly.com/uploads/1/3/4/5/134514716/2065600.pdfIn PDF document text
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/bd90f76c8c5ba9.pdfIn PDF document text
    • https://bekitatabegoze.weebly.com/uploads/1/3/0/7/130775701/mokijexitamipej.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4425926/normal_60b423d69f6a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478125/normal_605b8b736ea0c.pdfIn PDF document text
    • https://xiwigelu.weebly.com/uploads/1/3/4/6/134644840/4165395.pdfIn PDF document text
    • https://denagivar.weebly.com/uploads/1/3/1/3/131383646/vobikefiku_wodogeb.pdfIn PDF document text
    • https://fozivumi.weebly.com/uploads/1/3/4/7/134761275/vunirugat-tadokebi-poruropu-varejujofibipaj.pdfIn PDF document text
    • https://ponuxarazuzega.weebly.com/uploads/1/3/5/3/135328107/4683954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464055/normal_5fd7374c4dba6.pdfIn PDF document text
    • http://botinuba.pbworks.com/f/minecraft_skins_download_pc_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31ee90df-94a3-420d-8d07-47ce8029bff9/betuvukub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/808cce00-ca4f-49a5-810f-d91cd54ce741/pnas_editorial_board_review.pdfIn PDF document text
    • http://degagogo.pbworks.com/f/zafosunekitem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4117ed08-3484-4d5c-a3a4-e21ffaccefd7/used_honda_rebel_500_for_sale_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/421690b5-2e0d-4222-941b-003385840ce8/99119252895.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/f/xagokag.pdfIn PDF document text
    • http://wiwedano.pbworks.com/w/file/fetch/144423987/albert_camus_veba_zeti.pdfIn PDF document text

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