Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97978fe9734e91a…

MALICIOUS

PDF

107.8 KB Created: 2021-02-28 11:00:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: f9be2230e518cc93e84f7f271aeee8ed SHA-1: 3bad3c95548b7115862aea6df070ed493f2a85cf SHA-256: b97978fe9734e91aff316b5e3a93511af537299187100bae39ad22b3414ad303
184 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics and an ML classifier as malicious. It contains numerous embedded URLs, with at least one identified as a redirector to known malicious infrastructure. The PDF structure and embedded content suggest it is designed to lure users into clicking malicious links, likely for phishing or to download further malware. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://yafferge.ru/strik?utm_term=draw+tite+activator+5100+manual In PDF document text
    • http://miribut.mywebcommunity.org/2004_chevrolet_malibu_ls.pdfIn PDF document text
    • https://cdn.sqhk.co/bemoranoz/hj5uhdl/soguputuxagimoturo.pdfIn PDF document text
    • http://puveputado.sportsontheweb.net/japanese_phrasebook_app.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/onkyo_tx_nr509_arc.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/what_is_the_average_salary_in_argentina.pdfIn PDF document text
    • https://zipofero.weebly.com/uploads/1/3/3/9/133999904/bapopesopoti_mejikofejovig_vozuzibinezan.pdfIn PDF document text
    • http://avtoshtorki.shop/24650969998o1ihd.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/zefita_pagozotibob_bokubamiled_kupudurowu.pdfIn PDF document text
    • http://daating19.site/xupuperexajewesazomd29p4.pdfIn PDF document text
    • http://kumululurug.scienceontheweb.net/ti_84_calculator_free_trial.pdfIn PDF document text
    • http://fiwisud.getenjoyment.net/6.5_creedmoor_load_data_varget.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/when_does_dragon_ball_z_kakarot_dlc_2_come_out.pdfIn PDF document text
    • http://busivel.xyz/tegudilubowatimixxvtu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00016a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A5C 5236 bytes
SHA-256: 7edb473e0b47d81425f1f7f775387837bb39c5be676872c84b14a61f936431e0
font_01_sfnt_off00017c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C3B 11188 bytes
SHA-256: f0d398f395bb2e6370f6e0eb3db9d7de378fbfe6aee772bf0faf68bfd20ac8f6

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