Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecbf1340c33444c9…

MALICIOUS

PDF

59.9 KB Created: 2021-02-27 06:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 26dcb65a2bb1129cc615fe60f7e6a50a SHA-1: f2bb1f910a05d98ddabd907a21194b1538a31c3c SHA-256: ecbf1340c33444c971c170be90b2a913789a0ef4cf6c92156e66af02ae65b1a0
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics confirm its malicious nature. The primary attack pattern involves redirecting users to a network of disposable domains, likely to host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6876

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://nipisod.ru/award?keyword=bq-cc+17+sba3 PDF link annotation
    • https://cdn.sqhk.co/fefamuve/pcozjgN/can_someone_draw_me_as_an_anime_character.pdfIn PDF document text
    • http://laxeded.iblogger.org/wosubu.pdfIn PDF document text
    • http://istlan.space/best_survival_movies_2020fp0yb.pdfIn PDF document text
    • http://gagipelujer.iblogger.org/gateway_2nd_edition_b1_workbook_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_6036ffad09a2f.pdfIn PDF document text
    • http://cookwellbakewell.com/30699841560jsz3h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420238/normal_5fd7755939aba.pdfIn PDF document text
    • http://0fruits.space/48929789504laj5e.pdfIn PDF document text
    • http://veronaital.space/duvafikosetekiz2qlyw.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/gitIgjk/viwujuzeludedasawupu.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/hpiahj1/mobogowabusesogakepalugow.pdfIn PDF document text
    • http://silvanozito.online/windows_10_free_20177vz0m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385231/normal_5fd37a594850f.pdfIn PDF document text
    • http://sberbank.link/what_daphnia_eatb5nu9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424330/normal_60146136c216d.pdfIn PDF document text
    • http://smcjd.com/rudupefvbkoy.pdfIn PDF document text
    • http://contentmedialiteracy.com/porofufukajipitugizembvbr1.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/figo_guidelines_for_missed_abortionwn94e.pdfIn PDF document text
    • http://snail-case.store/jesurivuwenofoveko8dwrn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juzefabamurever.rf.gd/lisaregozabujamesifojiz.pdfIn PDF document text
    • http://tudavoje.epizy.com/que_es_cascada_de_coagulacion.pdfIn PDF document text
    • http://gidubivej.rf.gd/gikuduxelawamob.pdfIn PDF document text
    • http://lukovim.epizy.com/osha_injury_reporting_guidelines.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65C 5308 bytes
SHA-256: eb6dd0b4beefc22266d1b79049f3ddf022a30ea4c546a1b2ce6ae08d3b73da6c

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