Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4ffc0a491770da…

MALICIOUS

PDF

98.2 KB Created: 2021-03-27 18:04:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 40dc084618d8c7c006d4e0bf12279711 SHA-1: 12224dc583d9d68793925cfef8202ac043a9e54a SHA-256: 4e4ffc0a491770da0befe869f3c7d57465e85eb2e664d7ab4218c1d773eaafd4
134 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, and heuristic analysis indicates it is a link farm hosted on disposable infrastructure. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attack pattern involving directing the user to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/award?keyword=requirements+engineering+deutsch+pdf PDF link annotation
    • http://bridgecommerce.com/rekukudagutagujcbnz9.pdfIn PDF document text
    • http://lovechat24.club/rakezapopelewariqedat.pdfIn PDF document text
    • http://prizinsta365.site/cu2c2o4_nombre_qumico_para_sal_de_mbhma2.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501233/normal_5ff30f43652d3.pdfIn PDF document text
    • http://ketousa.site/destete_sin_lagrimaskhswj.pdfIn PDF document text
    • http://fringigejy.site/wufamezivodovugojal97q0.pdfIn PDF document text
    • http://cenderaoriginator.com/85861901579nwu11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_60304a1b7ac6d.pdfIn PDF document text
    • http://nojekufa.22web.org/53690484624.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381971/normal_5fcee649e33c9.pdfIn PDF document text
    • http://vakoxojokovuvi.iblogger.org/50027552570.pdfIn PDF document text
    • http://alcozerox.com/952003765010cp4k.pdfIn PDF document text
    • http://axecheat8.xyz/9472627704021ymh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_eb8a399bc236478c8ade7232accdefbf.pdf?index=trueIn PDF document text
    • https://a95edb9d-21e5-46e4-bb1b-b1fdf66a5dae.filesusr.com/ugd/09e34a_b9620b6896984b2eb47ce54613330c21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/607fd3a5-a5ef-4b92-bc81-d5793aeae5c3/how_to_breed_shiny_pokemon_with_perfect_ivs.pdfIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_4c15b1cc71d14e4cbb3e2c182073fb0d.pdf?index=trueIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_04599a672de849e4ad3503b721b8c065.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a88d57-0985-40a5-8efe-1f9ac80169da/how_to_find_angles_of_a_right_triangle_calculator.pdfIn PDF document text
    • http://nubimopupugu.rf.gd/fusion_bd_bangla_natok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f572c82-6739-4ff4-86f1-2c95fe867edf/ironman_2000_inversion_table_reviews.pdfIn PDF document text
    • http://filulakakinu.epizy.com/how_to_clean_nespresso_vertuoplus_with_vinegar.pdfIn PDF document text
    • http://zalerifi.rf.gd/alimentacion_en_adolescentes_embarazadas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001147e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147E 5460 bytes
SHA-256: d4c59e7aa795a4f3953c176d571305452fadc1f2e814a49a4890f4d477c2b19d
font_01_sfnt_off000126ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EA 11620 bytes
SHA-256: efe2e197b72f18ed9633d422e75ad95e2301f7f8c697b48dee100741c23d203b
font_02_sfnt_off00014ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED2 14980 bytes
SHA-256: 2a7db98d26d5a7144d44517d6e1b74e53944e711ee8113adc4bbc4c6e4e67242