Malicious PDF — malware analysis report

Static analysis result for SHA-256 53750b8a4aa0166f…

MALICIOUS

PDF

58.4 KB Created: 2021-06-02 15:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df1e5306c59bf6d078ce274c6f11cb87 SHA-1: 91949ff059f30569da99c1ded868af17379f29f6 SHA-256: 53750b8a4aa0166f9173b82a318e553c250b56194b4eeaea8a81b44e18d754c6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious due to its structure as a link farm, containing numerous external URIs pointing to potentially malicious or phishing sites. The embedded links, disguised with terms like 'henry russell hitchcock arquitectura', are designed to deceive users into visiting these sites. While no scripts were extracted, the PDF's nature as a link farm strongly suggests an intent to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9772

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://pistant.ru/pbw?utm_term=henry+russell+hitchcock+arquitectura
    • https://teseresoj.weebly.com/uploads/1/3/4/6/134644138/jezorujewifuvoleki.pdf
    • https://jujizifij.weebly.com/uploads/1/3/4/3/134309807/putajejuw.pdf
    • https://cdn-cms.f-static.net/uploads/4460708/normal_603e51cef05bd.pdf
    • https://gufekibeliwu.weebly.com/uploads/1/3/1/3/131382841/vudog.pdf
    • https://cdn-cms.f-static.net/uploads/4479223/normal_606219fd30988.pdf
    • https://cdn-cms.f-static.net/uploads/4501777/normal_6040354024892.pdf
    • https://sobopagep.weebly.com/uploads/1/3/0/8/130873740/gafidiroj.pdf
    • https://fiwisiroveton.weebly.com/uploads/1/3/4/3/134339953/3913322.pdf
    • https://uploads.strikinglycdn.com/files/f0922764-0d20-4149-b2f6-5973c109ae25/vafilujawujoxuvekaf.pdf
    • https://uploads.strikinglycdn.com/files/af2d28f8-dbbc-4ac8-850a-856536d8fa64/where_does_love_in_the_time_of_cholera.pdf
    • http://mizunebapod.pbworks.com/w/file/fetch/144455325/webokatiwipagen.pdf
    • http://wiwedano.pbworks.com/w/file/fetch/144427650/1432047970.pdf
    • https://uploads.strikinglycdn.com/files/a324fc48-0953-442c-af3b-566620658e54/30943884197.pdf
    • https://uploads.strikinglycdn.com/files/2ad67157-9a2c-422e-8c07-71f429c8db6c/gosidiniwibad.pdf
    • http://mujusevo.pbworks.com/f/ejercicios_de_metrica_resueltos_2o_eso.pdf
    • http://fudejob.pbworks.com/f/fonuxebenojalev.pdf
    • http://lokiboz.pbworks.com/f/harry_potter_and_the_cursed_child_bangla.pdf
    • https://uploads.strikinglycdn.com/files/71fa6593-7a94-46df-9e82-682b214909eb/92030078344.pdf
    • https://uploads.strikinglycdn.com/files/73228811-dea9-49e6-b22a-b9efc30327b0/44064051050.pdf
    • http://viluxese.pbworks.com/w/file/fetch/144415620/48180074782.pdf

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