Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5867cdd0abfe132…

MALICIOUS

PDF

76.0 KB Created: 2021-03-19 14:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1b2c9af1487079bb6e08e0bbe55fb653 SHA-1: 11c525788607a221ff73e4a0a02d88a6e3a029db SHA-256: c5867cdd0abfe132c425efe59e4f8edc5a24491a5c179e1390b2a89dad33e470
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, strongly suggests a phishing or malware distribution campaign. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jacksth.ru/strik?utm_term=how+to+reset+ge+oven+clock PDF link annotation
    • https://cdn.sqhk.co/kerutadit/3Hginje/buzzr_tv_channel_number.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/gjbhbjj/bijamagewu.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/reliance_capital_annual_report_2013-_14.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/zipuperavuvafu.pdfIn PDF document text
    • https://cdn.sqhk.co/guwezasov/0Pgg5rq/mexican_football_players_in_europe.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/przymiotniki_dzierawcze_angielski_wiczenia_dla_dzieci.pdfIn PDF document text
    • http://fabimepela.22web.org/excel_bedingte_formatierung_zwei_zellen_ungleich.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/fishing_rigs_for_saltwater_shore_fishing.pdfIn PDF document text
    • https://cdn.sqhk.co/wikikifigas/eigVA90/zomadikewugojadud.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/citizen_e650_factory_reset.pdfIn PDF document text
    • https://cdn.sqhk.co/fezemepusap/jd0hfhc/ziboxubezivapivibogifuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwosexed/PoEhhhj/fafebuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/GjcjiQ2/69764005149.pdfIn PDF document text
    • http://lalozakuren.66ghz.com/44095019083.pdfIn PDF document text
    • http://saporik.scienceontheweb.net/18505659232.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/ximonavedakudoreraw.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/jaidbau/wwe_extreme_rules_live_results_bleacher_report.pdfIn PDF document text
    • http://runivofo.iblogger.org/39251630194.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/iajb1hg/images_of_cosmos_flower_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/jjaNgeW/fexukofomuzetum.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/ny_state_central_register_mandated_reporter_hotline.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://katezoluvezile.epizy.com/23738842602.pdfIn PDF document text
    • http://bimopagog.epizy.com/59408580635.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/rekezedubosejet.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

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_off0000ed39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED39 4936 bytes
SHA-256: 64dc6098c2e6ab476045b550b86bccf4d02e5c88d7a05cad1190982648fe0ebd
font_01_sfnt_off0000fe30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE30 10724 bytes
SHA-256: d10ef601958227cdf6f9e44cba00f230bcfd06db54d0fac8ec9a19d4ab1d6187

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