Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ea5b3b9aec5a40…

MALICIOUS

PDF

58.4 KB Created: 2021-02-02 18:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ad72e601a5f55edd1f7ea67f6b987c6c SHA-1: 93f1753ada1fb4e1886e4b26bb3b8372f4a3281f SHA-256: 66ea5b3b9aec5a40f6e3ca973d87663da1f521228f1f73151935fb17095644fb
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm, containing numerous external URLs disguised as relevant content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8751

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/aws?utm_term=april+2019+current+affairs+pdf+gradeup PDF link annotation
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    • http://mrt-zdes.ru/make_your_own_connect_the_dots_free_onlinevvhex.pdfIn PDF document text
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    • https://cdn.sqhk.co/vaxarogajib/bFhb6ig/wiwitagiwesewufusunuz.pdfIn PDF document text
    • http://kataeta.club/cheap_hot_tub_hotels_near_mea1iir.pdfIn PDF document text
    • https://bigonukoduxa.weebly.com/uploads/1/3/2/7/132741189/a3fb7e70173.pdfIn PDF document text
    • http://segway-wheelchair.ru/zakaxevomudizamadosawuwoeoarx.pdfIn PDF document text
    • https://leniwexobopusez.weebly.com/uploads/1/3/4/7/134713406/ripozovipaza-vobivowaniwime-mudosetexu.pdfIn PDF document text
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    • https://soravetojovon.weebly.com/uploads/1/3/4/8/134890923/4782680.pdfIn PDF document text
    • https://pupowoxixibigi.weebly.com/uploads/1/3/1/4/131438439/7992.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416665/normal_5fee6e50b82b9.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/hjohi9D/mortal_kombat_costumes_kid_size.pdfIn PDF document text
    • https://toruganaduloxo.weebly.com/uploads/1/3/5/3/135347606/05da0fa2.pdfIn PDF document text