Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5155b9aa8e3e56…

MALICIOUS

PDF

80.5 KB Created: 2021-03-15 14:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 07ca48261e68552d4829369505747011 SHA-1: 5d9bf52385cc412e61c5712c83ad71e976845b99 SHA-256: 8a5155b9aa8e3e56de338e88fa5366d9f5d39a7405970e39ad826b9c738f5016
84 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a high-severity heuristic firing for a redirector link, specifically `https://kuzutuzo.ru/wix?keyword=pokemon+apk+gba+hack`, which is presented as a lure for downloading a file. The document body, though heavily obfuscated, contains references to 'Pokemon apk gba hack' and 'wkhtmltopdf', suggesting a deceptive download attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/wix?keyword=pokemon+apk+gba+hack PDF link annotation
    • https://cdn.sqhk.co/dikizumi/jE7jfDB/zedikojupobixurepokukese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489988/normal_60374dddddbf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_5fd8b3e667321.pdfIn PDF document text
    • https://cdn.sqhk.co/raguwubives/pjhHXih/fitness_ball_exercises_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/j3auFjc/light_up_reindeer_outdoor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452599/normal_5fe0c3195deaa.pdfIn PDF document text
    • http://falutaburifa.iblogger.org/41300713315.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zidenigad/puxaketerurari.pdfIn PDF document text
    • http://wefofumerari.rf.gd/playstation_2_games_pes_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/kijajimutomumaxaxidaxan.pdfIn PDF document text
    • http://goduziposu.rf.gd/what_is_the_best_salt_chlorine_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a4aaca-99f8-4e87-9801-733408c3ca32/how_to_manual_reset_flame_rollout_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/expressions_and_equations_6th_grade_worksheets.pdfIn PDF document text
    • http://junadalolupes.epizy.com/68532087041.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/22965332416.pdfIn PDF document text
    • http://koburolamugalo.rf.gd/elder_services_report_massachusetts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7383811-9770-4893-b901-2dad1028d4da/do_old_ipod_touches_have_bluetooth.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/al_mustaqbal_newspaper.pdfIn PDF document text
    • http://tabomojepudidu.epizy.com/bhangra_dhol_song_mr_jatt.pdfIn PDF document text
    • http://lutipojev.rf.gd/best_knot_for_braided_fishing_line_to_swivel.pdfIn PDF document text
    • http://desetezovadu.epizy.com/solemewipidolisudubazer.pdfIn PDF document text
    • http://futiwani.rf.gd/long_john_silvers_nutrition_facts.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_off0000fb75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB75 5248 bytes
SHA-256: 4080d0a14a1a4be5b4ae835b551839970d750e8d4a0eb10def5ae64534bff561
font_01_sfnt_off00010d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D30 11524 bytes
SHA-256: a6299b08fb21129da2c78de4f2378a4f01a6b0ebe76d6f5de68e075c34a920e1

Open this report in the interactive analyzer, or submit your own file for analysis.