Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5be667d45bc7be3…

MALICIOUS

PDF

65.8 KB Created: 2021-02-24 23:44:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 003942a9bb3bbdcc1714c97783f38ba8 SHA-1: 2d6770d2f613987f77aeaa3261053be4e44ad753 SHA-256: c5be667d45bc7be3975961a41b79c4042fda7a6677fe17899052fdcf602b5b12
126 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, disguised as a download for Microsoft Word. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, and the ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely used to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://maypoin.ru/strik?utm_term=microsoft+word+document+app+free+download PDF link annotation
    • http://ukranews.icu/98177248400gya63.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/how_to_install_games_on_ti-84_plus_mac.pdfIn PDF document text
    • http://noncomform.space/raiden_legacy_mod_apk_datani3q2.pdfIn PDF document text
    • http://creditscoretrack.info/vurawekapemefuxe6n8eb.pdfIn PDF document text
    • https://cdn.sqhk.co/dimumaneda/zja63hj/32899762948.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/tipo_de_gobierno_actual_en_venezuela.pdfIn PDF document text
    • http://bnatural.space/wemofuromifagegi7qa2z.pdfIn PDF document text
    • https://cdn.sqhk.co/risubibasero/Ujdnljd/gmail_recipient_inbox_full.pdfIn PDF document text
    • https://cdn.sqhk.co/bipukawu/qghrLJm/jiruxajesamotomujom.pdfIn PDF document text
    • http://shlifovka-pol.website/retupalakamumekfc04b.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/vNdtiaB/gears_of_war_2_xbox_360_price.pdfIn PDF document text
    • http://dhl-order.info/day_by_day_work_schedule_templategshyk.pdfIn PDF document text
    • http://hurleyshamburgers.com/piwufubojinadosebaxbbcpq.pdfIn PDF document text
    • http://klyshsheff.xyz/11027423401hvt4k.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/jhdgghg/32678267098.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/bosepaxatonufowafoko.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/matlab_plot_points_without_line.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/68326001932.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC43E 5400 bytes
SHA-256: f1ceb4cbe5e99cb6656b4d380417d7e62acdf6a7dddbdf322fc1569da3453a3b
font_01_sfnt_off0000d6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A2 10256 bytes
SHA-256: 1f53ba02813c5a26b1e7574a42c110070be5d6506d7c6d1aca1c296d1925a26c

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