Malicious PDF — malware analysis report

Static analysis result for SHA-256 285e05bedb361680…

MALICIOUS

PDF

86.0 KB Created: 2021-04-08 15:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 654f167d130f32e13dc1c975713d270f SHA-1: 16d67cbaf1126ed99a48e94c8cfd76fdd0360d0e SHA-256: 285e05bedb361680ef72030404d68274ffea38ca36415f7dd3941ac68460edcb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via the embedded URLs. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/strik?utm_term=word+pdf+formatting+issues PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421205/normal_600d61f8868ad.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxagoxoman/PFyig1S/79578670074.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofebiziv/ihjahjO/mater_education_high_school_adventure.pdfIn PDF document text
    • http://wagijap.22web.org/bavupatixagimibuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/degavorofala/ZShbzoX/wijubijagemufunidemasefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490125/normal_60460debefb5b.pdfIn PDF document text
    • http://rotixumuzu.22web.org/how_many_questions_are_on_the_cdl_air_brake_test_in_florida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419192/normal_60551ff69e3e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_6017f721719b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424646/normal_6003965bb42c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368504/normal_5fdf96fa360fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501057/normal_606c81d11d624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_605586d5f152f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491965/normal_5fdbd8608a197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446280/normal_600a1ed518ad5.pdfIn PDF document text
    • https://cdn.sqhk.co/sawomunuj/hdiejgE/free_mini_games_ps4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puzekubaxi.epizy.com/effects_of_bullying.pdfIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_fae5f0894e9e489fa54962b032806c3a.pdf?index=trueIn PDF document text
    • https://def05634-b969-4265-beeb-1e7d695e9a44.filesusr.com/ugd/6865ce_d0384855ae53480192477ac15841ec2c.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBA 5344 bytes
SHA-256: 8c9ccb6071221f6ad3dcac871eaad8aa5074ffd74120efe69c5bac235dea28b1
font_01_sfnt_off000121dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DD 12036 bytes
SHA-256: ac069c407267773d4914c10baa02169a8c4e387e11bd3e18b2ae9b442bf711a9

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