Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4cae2715e4fc6a…

MALICIOUS

PDF

82.6 KB Created: 2021-04-23 04:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eb01b7a77f7018cc0725703f7fa45251 SHA-1: 5572fef3100d8a34ba2ee52f780127eca90d8908 SHA-256: fe4cae2715e4fc6ad885c93d82e0494ed97058576a1f3f8398bb26e8d6fed828
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains a large number of embedded URLs, with at least one pointing to a suspicious domain ('zajinet.ru') that is likely used for phishing or malware distribution. The presence of numerous links suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=tabla+periodica+grupo+periodo+y+bloque PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407724/normal_602031b2793d8.pdfIn PDF document text
    • http://nikaold.site/nepinenagidefepukea7zy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427300/normal_6041dd84ce1bb.pdfIn PDF document text
    • http://juponuziwotaga.mywebcommunity.org/carlsberg_annual_report_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391907/normal_5fcedd4df301f.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/89757453103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_6032aafe98824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485305/normal_6018edfbc66ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_60240fd59d475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_5fd664772e80f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453719/normal_6066a7f6c65cf.pdfIn PDF document text
    • http://zujadise.scienceontheweb.net/discrete_probability_distribution.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468267/normal_60476afbe97b3.pdfIn PDF document text
    • http://card2card.live/listening_comprehension_exercises_onlinesz9il.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/35336042290.pdfIn PDF document text
    • http://postel-na-zakaz.ru/dozifeg0v76a.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
    • https://uploads.strikinglycdn.com/files/7a1e42b4-7dba-43e6-880f-ed0fc9163b4d/which_wagner_flexio_is_best.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42e9c006-12f4-4287-bbf4-d9adac32d3e9/71272173651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ccc500-a0aa-461e-8082-73b2ca0e9695/soxukufafodugeriji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eff6353f-a369-42ff-b6ba-046bf58a82f9/rival_shaved_ice_maker_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f03ee10-60a5-4f77-a616-22daad58c324/how_do_i_become_a_vegetarian_beginner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a95785a-8379-4dc4-9379-7f63c8a399de/how_to_write_good_advertisement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bae51dbf-90ab-46cd-a52a-3bef08f5b83f/diffusion_of_innovation_rogers_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/840d6897-fe8d-4a9b-af9d-102bae7a4073/61050455523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30fa983e-f47c-4b34-a93b-c1c462cb256d/maytag_portable_air_conditioner_exhaust_hose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1805aef-2767-46a9-a7e5-47e1b99348cc/22206151682.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_off0000f484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF484 5076 bytes
SHA-256: 0f038c81bf00a5db1941cb16703e05a1c8dcbb43e64a95c6f081143dfb2a9ba5
font_01_sfnt_off000105ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CA 12204 bytes
SHA-256: 940440e416f8b78de24735e56f6cba5e153b3a08aa2ff1a7b50568185056b44b
font_02_sfnt_off00012cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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