Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d21d2cf6759dd9b…

MALICIOUS

PDF

80.5 KB Created: 2021-03-26 10:29:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8d41493ed9781a2d01f530473c616afe SHA-1: d01fe9b2424ae2203878632a16d5f4617ba43abc SHA-256: 4d21d2cf6759dd9bb4f3184edd535914f3b7852b7e76704b35b541ab70af0e7b
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with the primary purpose of redirecting users to other websites. The document body, though heavily obfuscated, suggests a lure related to 'branded tv series theme song lyrics'. The presence of multiple disposable hosting links and the ML classifier's high confidence score indicate malicious intent, likely to distribute further malware or engage in phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://zajinet.ru/wix?keyword=branded+tv+series+theme+song+lyrics PDF link annotation
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://xteenware.online/thesis_statement_practice_worksheet_answer_keyz8dbt.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/cidco_lottery_result_kharghar_ews.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/autodesk_2015_xforce_keygen.pdfIn PDF document text
    • http://cenderaoriginator.com/georgia_drivers_test_appointmentm2zmh.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/mogozusemakidosakixib.pdfIn PDF document text
    • http://cashbackk.site/counter_terror_apk_modo1v4b.pdfIn PDF document text
    • http://nekazupafo.mygamesonline.org/33737024089.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/backyard_burger_nutrition_guide.pdfIn PDF document text
    • http://marifivelaj.mygamesonline.org/kevufidumupimu.pdfIn PDF document text
    • http://gijaninapumobe.sportsontheweb.net/55507116648.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/aggiornamento_android_pie_huawei_p10.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/82107898308.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_1caa58da30dc4dad8e9760f208197d9b.pdf?index=trueIn PDF document text
    • https://a3de454e-1598-42bb-a259-4eb69c42f179.filesusr.com/ugd/fb5067_cce0f91651604c869dafa687bfa16a00.pdf?index=trueIn PDF document text
    • https://78ee58ad-4251-4cb6-9d9e-6f806931ac90.filesusr.com/ugd/b6b4e8_ec583abf1fc34f1586e00f2e7b120347.pdf?index=trueIn PDF document text
    • http://paguxesij.myartsonline.com/bill_nye_energy_answer_key.pdfIn PDF document text
    • http://jopubijako.atwebpages.com/cozi_tv_schedule_tonight_columbo.pdfIn PDF document text
    • https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_99f796ffdbc94417bb985e546db97de9.pdf?index=trueIn PDF document text
    • https://c63359c4-faa5-40af-ad11-254ddd3d100c.filesusr.com/ugd/838c33_7a991b46fa234448ac64eda28b5a7007.pdf?index=trueIn PDF document text
    • https://5f98d79b-b704-4ecc-a618-200e52db7f79.filesusr.com/ugd/d1a5b7_3cc889e53da445ffb7f934b2d573c0b8.pdf?index=trueIn PDF document text
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_e906a8327a51478e97ae3c63b2f97a10.pdf?index=trueIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_a1eefe57035f4731819b5af129a1c583.pdf?index=trueIn PDF document text
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_5e51c31df4da4fde9f6ced049a564494.pdf?index=trueIn PDF document text
    • https://1794ee33-230d-455b-98b1-84d48067edce.filesusr.com/ugd/551769_45c9396351d946a4add91f20c6def148.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_off0000fa69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA69 5564 bytes
SHA-256: 2bb5fcb6de63160a47eabc1cb9e726bc7ab524f58ecaaebdecf2718bed01b692
font_01_sfnt_off00010d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3C 11328 bytes
SHA-256: a20307432dd005c8edacbcfb2d267c58288ebcdfed0e5c25225aed9227a45129

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