Malicious PDF — malware analysis report

Static analysis result for SHA-256 579b6b6799c8fe75…

MALICIOUS

PDF

70.9 KB Created: 2021-03-03 15:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 709a3ce969fa45dbf9ddef6222655915 SHA-1: 6f490f7fbbd472c2372e9bc2a8ed17b83c001725 SHA-256: 579b6b6799c8fe752b4cfaa6dc9f723ee4dfe21474e623b5cc5c7f3ed1a74bb0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with disposable hosting and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9098

Heuristics 4

  • 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 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://kuzutuzo.ru/award?keyword=curse+of+strahd+death+house
    • https://cdn-cms.f-static.net/uploads/4421611/normal_6023c4080bf61.pdf
    • http://jidapuxedepu.medianewsonline.com/remazigirixanuperenofi.pdf
    • http://lebuvowune.getenjoyment.net/50920127378.pdf
    • https://kapizufon.weebly.com/uploads/1/3/4/4/134486886/0343212c052dbe2.pdf
    • https://cdn.sqhk.co/detatakev/ijjgjfv/55975693868.pdf
    • https://cdn.sqhk.co/giripiponi/iyrpysm/rapefudowana.pdf
    • http://nopuvobetag.mygamesonline.org/personal_values_list.pdf
    • https://pajejasebuwosiw.weebly.com/uploads/1/3/0/8/130813778/wojodeju_nebojaxiji.pdf
    • https://cdn-cms.f-static.net/uploads/4415740/normal_5fe6cda7b6088.pdf
    • https://cdn-cms.f-static.net/uploads/4413843/normal_5fd826c77856e.pdf
    • https://cdn.sqhk.co/jujegopenop/Buhhxgj/dowewinadewikonopivamu.pdf
    • https://cdn.sqhk.co/purilusevike/ij7jfjj/24467921627.pdf
    • https://cdn.sqhk.co/kugefiruxat/jijjGWE/ezlink_auto_top_up_uob.pdf
    • https://static.s123-cdn-static.com/uploads/4424029/normal_5fde6fb7c7fbf.pdf
    • https://s3.amazonaws.com/vekodupiwarobi/marketing_plan_for_online_travel_agency.pdf
    • https://s3.amazonaws.com/gudukupir/10250863118.pdf

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