Malicious PDF — malware analysis report

Static analysis result for SHA-256 0814e1ff1de4672c…

MALICIOUS

PDF

71.9 KB Created: 2021-03-01 08:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: e1f2b78f672f29cc6d83a28156170c0a SHA-1: c74b28a046cc7092682f99f663ff9418f93e07d0 SHA-256: 0814e1ff1de4672c57199cfb451851217d72e52cf0a9af05178ab62b819859ca
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary one pointing to 'vilenefex.ru', suggesting a phishing or malware distribution lure. The PDF structure and the presence of external URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://vilenefex.ru/award?keyword=what+are+the+roles+in+agile+scrum PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499995/normal_6029804ccafb4.pdfIn PDF document text
    • http://probmaka.tech/gijuvejarilurefimis501cy.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzesowasu/cWWTyeY/vr_project_warsaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_6023e6fc54384.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459917/normal_5ffb267174d1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5fd7d787d0813.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486745/normal_5ff05f7fb8fc1.pdfIn PDF document text
    • http://itravelgr.com/la_scoperta_dellamerica_pascarellaz8xeh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367013/normal_5ff31b3f458a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425912/normal_5fc95e6bbeb0d.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/ujjiaRO/directv_guide_not_working_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402960/normal_600d417e2f232.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gejaran.epizy.com/what_is_the_full_meaning_of_mass_culture.pdfIn PDF document text
    • http://nugafafekovad.epizy.com/game_perang_android_mod_apk_offline.pdfIn PDF document text
    • http://numakuzugurewi.rf.gd/mirro_pressure_cooker_manual_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF40 5228 bytes
SHA-256: 8837283ae860c0a7f8fc8fd0162b4c4534c5d67e64e11d2d57ec3ba1d8ee8c89
font_01_sfnt_off0000f0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EA 9920 bytes
SHA-256: a248e99d727619d4e43706b267bad44b4c28d8e4329bdd867498a79032829a2f

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