Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef4a993e1fe06c1a…

MALICIOUS

PDF

49.0 KB Created: 2021-02-24 23:19:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b5c9cd25afd8f6bde8e72f9d5eec4aa6 SHA-1: 6df5b2536af7ec5e476e66de2abe6d00b504fba1 SHA-256: ef4a993e1fe06c1a2648d68a89812e6ee84b7196742fc32608582e1d2f0886f4
182 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML_NYX_PDF_MALICIOUS and ClamAV detections further support its malicious nature. The document body, though heavily obfuscated, suggests a lure related to audio equipment, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7113

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=how+to+bias+fender+deluxe+reverb+reissue In PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/VpghQif/giruzojosom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450732/normal_6004be1109e5b.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/10445147101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_6015fc1b14eb4.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/tqhgii8/eon_player_pro_apk_5._0._6_r31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418370/normal_5fc72e4342afa.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/gixukizezagabo.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/hf5gc74/pdf_reader_viewer_2019_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/sifolilo/jagiXif/tagiw.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/hhfhfgg/tiktok_disney_animal_filter_icon.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/chiii0R/pottery_painting_birthday_party_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/6tjiRjj/gazotaxeruzagedowibiw.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/ugfhcyk/popular_wars_mod_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/rutovelabowiliwemoruv.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/93388990926.pdfIn PDF document text
    • http://kawisud.rf.gd/nco_study_guide_board_questions.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/g-shock_gravitymaster_ga_1000-4a.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/garden_furniture_cad_blocks_free.pdfIn PDF document text
    • http://bubejukajogimis.epizy.com/dictionary_app_english_to_marathi.pdfIn PDF document text

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