Malicious PDF — malware analysis report

Static analysis result for SHA-256 8327556fefc887d8…

MALICIOUS

PDF

86.3 KB Created: 2021-03-11 11:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5b4c15ed735f654fc8821ba61bf13136 SHA-1: 97f8e878f6773a9583276ece85b2f2d34d790921 SHA-256: 8327556fefc887d8f63fc5699b635e13466379bbb876b7118e41d86b645f1e96
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high probability of malicious intent. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute further malicious content or phishing lures. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly indicate that the primary function of this document is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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://vilenefex.ru/award?keyword=alphabet+tracing+book+pdf PDF link annotation
    • https://mutixuvuv.weebly.com/uploads/1/3/4/6/134665255/406685.pdfIn PDF document text
    • https://vunukufe.weebly.com/uploads/1/3/4/6/134640969/gakez.pdfIn PDF document text
    • http://pozufopajosel.mypressonline.com/71377005529.pdfIn PDF document text
    • https://cdn.sqhk.co/kizajituxab/hTAMI6f/american_horror_story_ringtone_free.pdfIn PDF document text
    • http://bopugafuwu.scienceontheweb.net/xbox_live_error_code_8015d002.pdfIn PDF document text
    • http://bizowokare.getenjoyment.net/48480557431.pdfIn PDF document text
    • http://sunugukumota.getenjoyment.net/95239297165.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/hjieUgf/thoracic_outlet_syndrome_treatment_exercises.pdfIn PDF document text
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/wewunezejo.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/JpXKaii/nike_outlet_near_me_sale.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/4590059.pdfIn PDF document text
    • https://mexasazage.weebly.com/uploads/1/3/4/5/134513067/vugelufelegejeroz.pdfIn PDF document text
    • https://fofomobagukewe.weebly.com/uploads/1/3/4/3/134352826/pivafo_puxowadakarudor.pdfIn PDF document text
    • https://cdn.sqhk.co/foxezevewa/oIxgchi/92814331958.pdfIn PDF document text
    • http://gazozasi.scienceontheweb.net/votomirar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kakasis.onlinewebshop.net/bokinugebelimovidulop.pdfIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/saxolibaraxoxamaga.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF92 5432 bytes
SHA-256: 5245b4eec09316478b640e6e15d71d1d7e082a22a58e685774a6e1baa83e70ac
font_01_sfnt_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 8376 bytes
SHA-256: 5564a649459b90e9c6f0602ab21b6cd8cbc89b2b4295a9bd58485e285811caf6
font_02_sfnt_off00010972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10972 10664 bytes
SHA-256: 3f5e84bc3b1c4a2f4697c5035a1146f10dc82d63b23e8476b8d0503fdf3c7ef3
font_03_sfnt_off00012e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E23 16316 bytes
SHA-256: a0f91dd884ae6e41972b31fe3d77a3fa971159b31faf874f7a11b9cf065ce13e
font_04_sfnt_off000143ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143BA 1736 bytes
SHA-256: 551918360585b1590efa6fd2a215345b2f702067d151a0e4b48cfa7490b57960