Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b2c9a5b3363926…

MALICIOUS

PDF

75.3 KB Created: 2021-04-07 10:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b236d645d15f7f4c412441037fa56d76 SHA-1: 7d3be63f6cc539bde792e55e698f19f4b4cf019f SHA-256: 67b2c9a5b33639269256aa28e40404eafa0b2c8ef90712badbb829a3fc66ca7d
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded links, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The PDF's structure and embedded links are indicative of a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=daniel+planta+wrestling PDF link annotation
    • http://julivojurukumu.sportsontheweb.net/breaking_into_wall_street_interview_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/fCxnhg6/battle_sound_effects.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404733/normal_6007c3a292908.pdfIn PDF document text
    • http://xefawojuj.mygamesonline.org/juxilalesusemesudo.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/99453659780.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/kavimola.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388177/normal_6008a44d0f683.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449998/normal_5ff77ec82bba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_604cc6312c5f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420939/normal_60379cf70d688.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/viware.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454042/normal_602b3d90326a5.pdfIn PDF document text
    • https://cdn.sqhk.co/pekobenew/TfiaPSI/totenuzanavogavifirifabo.pdfIn PDF document text
    • https://cdn.sqhk.co/naliwanik/jjX4ihg/2157585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_602b61f3cc280.pdfIn PDF document text
    • https://cdn.sqhk.co/pisimebuziz/iItjgVZ/57150470585.pdfIn PDF document text
    • http://joweponula.mywebcommunity.org/mesilato_de_doxazosina_bula.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445890/normal_5ffcb873305bf.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/muvemasoxaji/used_law_books_for_sale_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/where_is_a_suntrust_bank_located.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/tetigotonalasowoko.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/microsoft_system_center_2019_licensing_guide.pdfIn PDF document text
    • http://ruzakema.onlinewebshop.net/compressing_files_illustrator.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_off0000eb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB13 5076 bytes
SHA-256: 8eef6ee4d6b24600ccf606973b6762f0f006ee0353e7bba5b0ace188f8936933
font_01_sfnt_off0000fc82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC82 10412 bytes
SHA-256: c316cebf3e80151c43836b15d9a004675e8695924ab5db0a6cb1f86ebb35fee5

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