Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e7bbb1807bca0c…

MALICIOUS

PDF

85.5 KB Created: 2021-04-29 20:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a31b87a493a306b6d41bbfcf908e7e16 SHA-1: 8c9ac3597513dbcdeaa0c523e3b4a73d691565d8 SHA-256: 76e7bbb1807bca0c90b8aa06f8cb8082639a71e1a6f14b99fd2f88fdb066ea67
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URLs suggest the document is designed to lure users to external sites, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=john+fraser+secondary+school+rate+my+teacher In PDF document text
    • http://italywow.pro/gotapikituwosoluboxc9n9g.pdfIn PDF document text
    • http://bezorujod.iblogger.org/dijum.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxagoxoman/ONhe8IZ/big_east_women_s_basketball_tournament_bracket_2020.pdfIn PDF document text
    • http://fuxisileza.mywebcommunity.org/gijatut.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/Bijbgi3/29487898359.pdfIn PDF document text
    • http://snapchat-alert.com/xujugawakimapojixanui22k6.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/7jfHghh/86930748434.pdfIn PDF document text
    • http://doordash.fun/8960603691662xlk.pdfIn PDF document text
    • http://zonitupupafof.sportsontheweb.net/takeragobetidoso.pdfIn PDF document text
    • http://allerlo.xyz/exploratory_play_ideas_for_preschoolerss641d.pdfIn PDF document text
    • http://effektzhizni.ru/sway_with_me_free_piano_sheet_musicuam7i.pdfIn PDF document text
    • http://igme.site/2003_ford_focus_svt_head_gasket_replacement1c5lc.pdfIn PDF document text
    • http://wegansit.space/huskee_riding_mower_tractor_supplycvgl1.pdfIn PDF document text
    • http://zelegurelo.iblogger.org/54590079546.pdfIn PDF document text
    • http://boguzimaro.getenjoyment.net/doreruro.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/hhfjjjM/galaxy_wars_2018_mod_apk_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/66aa62da-d5f5-4f92-95c1-679603d8edf0/xopikoxopan.pdfIn PDF document text
    • http://vesedakowata.onlinewebshop.net/67620037878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4c5db4-df21-4d0e-ae23-6dc1b5caedf4/59782629180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8833c427-d9ef-402e-96aa-cf7d99370d21/lonely_planet_guide_western_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/893e0ac2-7c20-4507-afda-d1c6877a65e2/62049841359.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/88858327861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93f4e0f-ab82-4609-ae85-f2955710eb83/vezubelenerabato.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_off00010c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C28 5352 bytes
SHA-256: c5ef07109ad866f59c21cbc2c31ad902411df5b1d5b244dd8805c6de0489964e
font_01_sfnt_off00011e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3D 13032 bytes
SHA-256: b7b5f6d8a47a24b4264be596397ce6114a416bf3b1650ec044d6d6926e37d7cd