Malicious PDF — malware analysis report

Static analysis result for SHA-256 543525fecd248f92…

MALICIOUS

PDF

77.8 KB Created: 2021-03-20 22:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bca782c4aec0b669fac29f48acd6b490 SHA-1: 27d46f555daece6dbf70e5175863fa8244357691 SHA-256: 543525fecd248f92960f1bec6dbfb7000a90fa82d5c62223f4ebc34b11b011c2
66 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier with high confidence. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates this behavior, likely intended to drive traffic to malicious sites or host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://jacksth.ru/strik?utm_term=living+by+the+indwelling+life+of+christ+pdf PDF link annotation
    • http://shlifovka-pol.website/agriculture_images_in_tamiljwm4s.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/where_are_there_food_banks_near_me.pdfIn PDF document text
    • http://tamodemuror.getenjoyment.net/auditor_general_report_2020_ghana.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/cYZsnRd/xejofilujukezowavam.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/how_does_the_gone_girl_book_end.pdfIn PDF document text
    • https://cdn.sqhk.co/kufagilan/jn4k5lm/gufemisofalewud.pdfIn PDF document text
    • http://cupe1.ru/maven_tutorialu0xps.pdfIn PDF document text
    • http://natnat.fun/95036228618ub75a.pdfIn PDF document text
    • http://bejawutipage.mywebcommunity.org/93398705175.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/ehgvMG2/texas_unclaimed_property_deceased_parent.pdfIn PDF document text
    • http://roselosudeve.sportsontheweb.net/66358108575.pdfIn PDF document text
    • http://zajiledafalam.getenjoyment.net/obecn_a_anorganick_chemie.pdfIn PDF document text
    • http://purpless.vip/40201943962cvkj7.pdfIn PDF document text
    • http://nijewogifuzazi.mypressonline.com/bangladesh_passport_reissue_form.pdfIn PDF document text
    • http://hangzhoumetal.ru/chatbot_development_platformsecprn.pdfIn PDF document text
    • https://cdn.sqhk.co/gijosevozu/ihjjrJi/monkey_shoulder_batch_27_blended_malt_scotch_whisky.pdfIn PDF document text
    • http://rewokujow.scienceontheweb.net/christian_apologetics_geisler.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fogovulosuzan.onlinewebshop.net/38274703634.pdfIn PDF document text
    • http://nimozan.epizy.com/wakupo.pdfIn PDF document text
    • http://vasenatisa.epizy.com/52808775860.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59E 5328 bytes
SHA-256: e37dfd27d625a876f386201b1c03a57e2d2e2953e8a5779a70711b018ae79d8e
font_01_sfnt_off0000f7d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D1 10684 bytes
SHA-256: 319f8b11dc2f59eac3e89f1043dfe0d83498deea1bcc5319f556a8082d553b75
font_02_sfnt_off00011bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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