Malicious PDF — malware analysis report

Static analysis result for SHA-256 e371c3358f86b2ea…

MALICIOUS

PDF

67.6 KB Created: 2021-03-19 05:07:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffc25aca9c62fbceb51ae6dec82ff965 SHA-1: b37c405f311ea0857e123cf6d15b434cd6820413 SHA-256: e371c3358f86b2ea52f42fde40ec66d56b6b41ca216a59fa1fb189a96901217f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically indicates a non-clustered link farm on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9605

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://zajinet.ru/aws?utm_term=drawing+non+linear+graphs+worksheet
    • http://xesesevatep.22web.org/tuzowenibu.pdf
    • http://vudasuti.mygamesonline.org/buku_teks_bahasa_arab_tahun_1.pdf
    • http://lajulufubugo.22web.org/famazojumodesejivax.pdf
    • http://zogometemo.sportsontheweb.net/99568293308.pdf
    • http://kifopelidito.mypressonline.com/modeling_of_adhesively_bonded_joints.pdf
    • https://cdn-cms.f-static.net/uploads/4448976/normal_6037d89870f43.pdf
    • http://fiwisud.getenjoyment.net/xobupelewegow.pdf
    • http://wutanumijejol.sportsontheweb.net/marlin_60_22lr_canada.pdf
    • https://cdn-cms.f-static.net/uploads/4367013/normal_604fa49bdfd97.pdf
    • http://jasazotinalol.mygamesonline.org/cambridge_primary_english_stage_3_teacher_s_resource_book.pdf
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_55127d90feaf46db8bd8fba1c0f5042b.pdf?index=true
    • http://jategemi.epizy.com/us_ending_explained_reddit.pdf
    • https://s3.amazonaws.com/lixuduwonifa/academs_fury_read_online.pdf
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_15c4a9f74f414c40b0680c9b7e2b8f49.pdf?index=true
    • http://zuwarikufaz.epizy.com/winiretepuxagesedufa.pdf
    • https://s3.amazonaws.com/juliziwojatige/508759803.pdf
    • https://s3.amazonaws.com/buxoparadazegu/18228830024.pdf
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_bc86fb0c61504bd0b90aa0bd2628d6c9.pdf?index=true
    • http://bafuwujix.atwebpages.com/6017106501.pdf

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