Malicious PDF — malware analysis report

Static analysis result for SHA-256 871cecd2f2efff15…

MALICIOUS

PDF

73.3 KB Created: 2021-03-23 05:35:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c8508233915eeee558248d968154ef1e SHA-1: 1c13f3613115c4e8feb5221eea1f65182c43eff0 SHA-256: 871cecd2f2efff157954557aea82004af2faa5176e61639fea409544007a6440
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Cat in the hat book quotes thing one and thing two' and embeds a URL pointing to a malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=cat+in+the+hat+book+quotes+thing+one+and+thing+two PDF link annotation
    • https://s3.amazonaws.com/jakujakula/mowixeguxodelu.pdfIn PDF document text
    • http://good-production18.site/ternary_ionic_compounds_worksheet_a_side_2_answer_keylpuao.pdfIn PDF document text
    • http://mebets.xyz/47660601569rmftc.pdfIn PDF document text
    • http://vidclips.design/stickman_legend_of_survivalxrmbb.pdfIn PDF document text
    • http://vienvozvrat.site/fatofubolowiwukotoitaaq.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/OBliegf/ding_ding_ding_good_morning_download.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/nutrition_information_peanuts_in_shell.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/app_store_icon_illustrator_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/xml_formatter_plugin_for_notepad_64_bit.pdfIn PDF document text
    • http://sokfresh.fun/acknowledgement_sample_for_undergraduate_thesisfzjmw.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/iPhhlja/anime_wallpapers_4k.pdfIn PDF document text
    • http://itash.space/682631039394lnd6.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/how_to_train_your_dragon_2_full_movie_in_hindi_download_filmyzilla_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/LagcVV4/73153808651.pdfIn PDF document text
    • http://bionatur.space/42623810516rqm1b.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/nenodoxomawaguxipobele.pdfIn PDF document text
    • https://cdn.sqhk.co/doporaba/aicjjn4/kujilopudige.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/MifiglK/scruffy_murphys_worcester_hours.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_7f27d10f1f51459cbcaa359bdc1bc144.pdf?index=trueIn PDF document text
    • https://5634f520-c25d-421d-ab67-3d94505d13cb.filesusr.com/ugd/1b85ab_f40c073bc01e4855a2a93dedcdaa77c2.pdf?index=trueIn 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_off0000df57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF57 5288 bytes
SHA-256: 75b945a0b70e1ac348ee904249cb6a218d4819754513d16173b380135d77aa28
font_01_sfnt_off0000f155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF155 11608 bytes
SHA-256: 65fa277dc628efa7cb53d5bdc0aa04d6fc2fed3c6d4a395b8f3d8bf2a42e02ec

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