Malicious PDF — malware analysis report

Static analysis result for SHA-256 237f5bcce6794f3d…

MALICIOUS

PDF

95.2 KB Created: 2021-03-28 19:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 3a73fe21ddf7ae0dfffd40b59b14f099 SHA-1: 2718f4b73708fff33a1a62c00dd7083d011f0c60 SHA-256: 237f5bcce6794f3dfeab3f8ba51844d179941879327ccdec0cbc661a5af0bd87
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically designed to trick users into clicking a link that leads to an SEO redirector. The primary malicious URL identified is https://gimoguvi.ru/123?utm_term=triple+c+ka+full+form+video, which is likely used to host a phishing page or download further malicious content. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gimoguvi.ru/123?utm_term=triple+c+ka+full+form+video PDF link annotation
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://xteenware.online/fuvijumadowavuti8oq5w.pdfIn PDF document text
    • http://hargotel.xyz/69656656085ckosi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451035/normal_5ffa59427bdb9.pdfIn PDF document text
    • http://itgermany.net/how_to_setup_linksys_re1000_wireless-n_range_extender_without_cd0ma3t.pdfIn PDF document text
    • http://aromaita.space/97843325240pm2wc.pdfIn PDF document text
    • http://thepropheticapp.com/states_of_matter_review_worksheet_answer_keyrmabd.pdfIn PDF document text
    • http://coins24h.com/falitexabikezixokopevurbg914.pdfIn PDF document text
    • http://bnl-jobs.com/do_you_have_to_use_a_filter_bag_with_a_shop_vacjbdkp.pdfIn PDF document text
    • http://smartbright.club/79729189530r2zod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415081/normal_60385bcbb3b4b.pdfIn PDF document text
    • http://how2clever.com/altar_call_roy_gane7l1c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/jozaponi/88003507354.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/heroes_of_olympus_characters_ages.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/angular_cli_8._0._2.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/what_time_is_the_sims_4_update_june_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/bhai_bolte_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/angular_6_reactive_form_phone_number_validation.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/4157626029.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/classification_of_antipsychotics_drugs.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 5196 bytes
SHA-256: bc9d4175843ae34ff8c6f9e1d93cc56e1b53618603ab88cd03c683169cf833f2
font_01_sfnt_off00011125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11125 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00011c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C88 10520 bytes
SHA-256: 8afe1d539eda8f9390a703ca31b617ae97de02580eeaa585a0c77bb41a0dbd0e
font_03_sfnt_off000140b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B7 15652 bytes
SHA-256: 4629361106b165eef5fc236712b79978c121d73d60fdbdbaa0e93d7bdea46735

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