Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b451d1b03910ab4…

MALICIOUS

PDF

70.5 KB Created: 2021-03-30 10:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c9dbdf12e673247c728f0c81883cc53d SHA-1: dc4240dd8cce308da303a409059d2119ebf5ebc4 SHA-256: 2b451d1b03910ab47ed87781098aae72a39c76443f8238c28215190fcf877a8a
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded links that redirect to a suspicious domain, identified as a potential phishing lure. The ML classifier strongly indicates maliciousness. Although no scripts were directly extracted, the presence of a redirector URL suggests an attempt to download or redirect the user to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://jumiwimov.ru/strik?utm_term=much+ado+about+nothing+discussion+questions PDF link annotation
    • https://cdn.sqhk.co/dejuxafe/jifgjjo/faxotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497358/normal_601bac6f7dd26.pdfIn PDF document text
    • https://cdn.sqhk.co/bomenojosa/cuXK2O1/70930661914.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/blank_page_with_border.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486763/normal_601d67317be0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455208/normal_5fe3ca4daa882.pdfIn PDF document text
    • http://kusukeluwabe.mywebcommunity.org/38708803263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465144/normal_601b011932a62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527747/normal_5fc716ef87680.pdfIn PDF document text
    • https://cdn.sqhk.co/fedugaxoloz/igsZnii/56757620020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485800/normal_604cddc4a4f2e.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/iS1jehg/luccas_world_jungle_adventure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420448/normal_60031feb6d1c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417208/normal_6024253163a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402960/normal_60247cd52f1c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a48d764-2a0a-462f-a66d-0855cb4e7951/gem_of_the_ocean_play.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b73711-a827-4e0b-af17-6eff1e7e45c5/83130896909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ee778a-955d-4d24-b91e-fc63ccb8f3b9/wupoxanewopegatizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/016715d4-138f-4d20-9b85-30dffaa7c0d5/how_to_acer_iconia_tablet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21164e22-a4c6-406a-93bc-19c83412a7ad/rodojuxan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad344019-06bf-4553-94b1-c3d3db96129e/hp_officejet_h470_not_printing_black.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E8 5344 bytes
SHA-256: f570309ce780b693810c3ed6015872bfc09971ca8c36ad6ed49d37d26197351c
font_01_sfnt_off0000ea15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA15 10060 bytes
SHA-256: 4963dd6ce5fdd1db99e4846798e19d0279a82d3dd735c4acf71374bd00595717

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