Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2f277a77289b52…

MALICIOUS

PDF

63.6 KB Created: 2021-02-13 09:07:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cea33f3d5c8048ff37fc7224ea7e3e1d SHA-1: a3dc6dfe8191acd774e5ce2360b2f3e0e49cffd8 SHA-256: 4b2f277a77289b5288ebeaa39db09947352d96a2a56b954cd6086bf087556536
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a high ML classifier score indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to distribute malicious content or phish for credentials. While no scripts were extracted, the presence of external URIs and the link farm heuristic strongly suggest a malicious document, likely used as a lure for further compromise.

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://maypoin.ru/wix?keyword=unit+2+vocabulary+answers PDF link annotation
    • https://cdn.sqhk.co/votojuxosaf/c4ijigg/tewawarikomo.pdfIn PDF document text
    • http://infokurs.design/rivimijuxesazamegeqwxo.pdfIn PDF document text
    • https://cdn.sqhk.co/xobanozizesa/esjaji1/13620650306.pdfIn PDF document text
    • https://foxetevuleludo.weebly.com/uploads/1/3/4/8/134859937/zapejubinon.pdfIn PDF document text
    • https://bumesusibob.weebly.com/uploads/1/3/1/8/131857970/vamujepumumifusod.pdfIn PDF document text
    • http://pogolaf.iblogger.org/luigis_mansion_2_sheet_music.pdfIn PDF document text
    • http://souve.me/dukinerotajifoda4ei8d.pdfIn PDF document text
    • http://shopsupergood.site/cooking_diary_mod_apk_1.7.2d0r3z.pdfIn PDF document text
    • https://kenomuxi.weebly.com/uploads/1/3/4/0/134042647/gowojigomusapijimu.pdfIn PDF document text
    • http://ita-bio.space/canningvale_sheets_target0v0cz.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/h5ifjj4/drag_and_drop_function_not_working_in_outlook.pdfIn PDF document text
    • https://wuwifure.weebly.com/uploads/1/3/4/6/134647121/berapuf_jakiwufari_bidifif.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/vavabi/pugireki.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/gb_whatsapp_new_version_7._81_update.pdfIn PDF document text
    • http://mopezuvo.epizy.com/waterco_salt_chlorinator_manual.pdfIn PDF document text
    • http://tafoboverel.epizy.com/rulunise.pdfIn PDF document text
    • http://lidiwerefibe.rf.gd/zigejezujizeludimo.pdfIn PDF document text
    • http://molulig.epizy.com/46878491505.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_off0000bd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9B 5312 bytes
SHA-256: 5669e546b9939a103bfefdb2d393ff98a290de51c29fe70a360a2a3197d5d43e
font_01_sfnt_off0000cfd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD7 9876 bytes
SHA-256: 322c159b4870b08abc3cb2a22484617f4f7d2e7a940fc3e5d8cd1c9385910f3c

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