Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd0d6584c6e2858…

MALICIOUS

PDF

77.5 KB Created: 2021-02-24 06:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ae8282b5001c8b49838b464e1cbea28d SHA-1: f18814ae274f7c454dea541301d0e362545ef2cf SHA-256: 6bd0d6584c6e2858e07fbc8aa5ecd8a55339a52ab6dbdf26fa32c13e97f58004
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of an SEO poisoning or phishing campaign. The ML classifier strongly indicates maliciousness. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=maytag+front+load+washer+replacement+parts PDF link annotation
    • http://fibufadal.iblogger.org/board_exam_date_sheet_2020.pdfIn PDF document text
    • http://lekezoreg.22web.org/nokia_android_phone_test_code.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/ZLNgekv/fiola_ceballos_age.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/afJhaDx/capitalism_definition_sociology.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/thfjjQW/watch_tv_channels_live_free_android_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/jhc6idA/netirofured.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/jegggei/introduction_to_business_management_notes.pdfIn PDF document text
    • http://xelirap.22web.org/44586818752.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/e6iegii/absorption_spectrum_definition_in_simple_words.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386618/normal_5fe1fbfe2f1be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/80942700545.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/zanadez.pdfIn PDF document text
    • http://jisixapuwalim.epizy.com/91301289913.pdfIn PDF document text
    • http://sonapap.rf.gd/basotalifezum.pdfIn PDF document text
    • http://sanaxumidi.epizy.com/39919397027.pdfIn PDF document text
    • http://zudavowopo.epizy.com/9344102442.pdfIn PDF document text
    • http://kinowazekuponaw.rf.gd/reporteros_de_gol_tv_ecuador.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/beetv_mod_apk_ad_free.pdfIn PDF document text
    • http://sujetokotew.rf.gd/best_student_award_certificate_format.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_off0000f07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07C 5768 bytes
SHA-256: 0ffda4c9544e1a2bccf1adc2efaac83b076359f97ebdb7ba2756b28c31a6495f
font_01_sfnt_off0001042a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042A 10504 bytes
SHA-256: a01c1875c417dd664a5e1d2a428e4afbfa78c28409c807477e07b10ded5018d9

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