Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd3a02fcbb01172…

MALICIOUS

PDF

72.2 KB Created: 2021-02-20 09:28:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 224042e6582766cf0ddd712682925152 SHA-1: 34ab37bc9abca0f76d8d9192f8c589f90e022213 SHA-256: 6cd3a02fcbb01172951717f0bb525206707acafb6a9ad65993b689e47559a32c
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains multiple embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates malicious intent, likely to redirect users to malicious sites for content such as pirated books or other lures. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://baarspo.ru/strik?utm_term=ios+apprentice+8th+edition+pdf+download+free PDF link annotation
    • http://lnstagramverifiedsbadgesforms.com/31041881725glta9.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/R1TBpOJ/bawosidijowonofarezubo.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/tjhhfhf/lobojanaxuwo.pdfIn PDF document text
    • http://teaapple.space/21988914832gjr9n.pdfIn PDF document text
    • http://makamar.online/how_to_use_lg_steam_washerrh4ju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366350/normal_5feb88ce490d9.pdfIn PDF document text
    • http://pocki.top/nespresso_vertuoline_decaf_pods_amazonyrfq9.pdfIn PDF document text
    • http://espacecmb.xyz/tuck_everlasting_story_summary5ybb6.pdfIn PDF document text
    • http://luxshop21.site/how_long_is_harry_potter_6_without_creditsn48cp.pdfIn PDF document text
    • http://1xbet-registr.site/5401818350xc2yv.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/huDigsE/minutoxetijuv.pdfIn PDF document text
    • http://free-at.pro/lipids_quiz_questions_and_answersrixyg.pdfIn PDF document text
    • http://habercigo.com/62639024754obbbd.pdfIn PDF document text
    • http://vodabezoli.iblogger.org/goodnight_moon_eric_whitacre_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_5fd95f0e1a411.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zejowupifodoj.rf.gd/south_iceland_map.pdfIn PDF document text
    • http://mutifesojare.epizy.com/finizejisutimiriwitiminez.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/free_vocabulary_worksheets_for_6th_grade.pdfIn PDF document text
    • http://fuzimobikuxuta.epizy.com/ff13_weapons_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/12170412677.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_off0000da3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3C 5464 bytes
SHA-256: 624fb8abcd4ea840c869eb3e1441de258549cb7a8918a181cb28cfae2f10ceb8
font_01_sfnt_off0000ecdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDD 11288 bytes
SHA-256: 38b02b2ab4b813c7d916dd74846cdf88e6dce2d1bdc8a62ce5e0edc3d5102e04

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