Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c25901e24589cce…

MALICIOUS

PDF

78.0 KB Created: 2021-04-23 18:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e4320d8e2ce5ab5a2e4ff0b19c43e445 SHA-1: 7f49506ec13579c5e5ebd76d41e43a2c680b2cea SHA-256: 7c25901e24589cce8f2479821eea96f192912da23209cbeff07e394ddeeae437
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru' and disguised with a 'cyberpunk 2077 update' lure. The PDF structure also indicates it's part of a link farm, suggesting a phishing campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/strik?utm_term=cyberpunk+2077+update+pc+patch+notes PDF link annotation
    • https://cdn.sqhk.co/gotevobogefa/dgcXOhc/25108445970.pdfIn PDF document text
    • https://cdn.sqhk.co/xupotuferu/aHjegea/internet_en_tu_casa_movistar_mexico.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/tegozanopoti_rakabojixidunuf_nubopupedipusev.pdfIn PDF document text
    • http://nufarelarapo.iblogger.org/baby_doll_uma_new_song.pdfIn PDF document text
    • http://reawolt.online/how_to_use_animated_gif_in_procreateim49b.pdfIn PDF document text
    • https://vokinojen.weebly.com/uploads/1/3/4/8/134851280/tobukepelopufo.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/ihafBge/82423825500.pdfIn PDF document text
    • http://biotringel.shop/mechanical_engineering_course_cost8y4vk.pdfIn PDF document text
    • http://lbaranaydin.com/poulan_pro_bvm200fe_spark_plug_gap03y9f.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/fierce_conversations_book_summaryy8eo1.pdfIn PDF document text
    • https://cdn.sqhk.co/bemememu/hqjcbhi/reigns_game_of_thrones_cheats.pdfIn PDF document text
    • https://pakefipeve.weebly.com/uploads/1/3/4/0/134017053/2939293.pdfIn PDF document text
    • http://lasabobobatir.22web.org/receptor_nicotinico_de_acetilcolina.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/ajdOu1c/blank_vertical_business_card_template_microsoft_word.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gumuleg.epizy.com/uco_bank_cheque_book_request_form.pdfIn PDF document text
    • http://zenutetuzobo.epizy.com/dexotaxiduxekawazinakuf.pdfIn PDF document text
    • http://mimogovudefo.rf.gd/toutes_les_blagues_de_toto.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/the_ransom_of_red_chief_questions_and_answers_class_8.pdfIn PDF document text
    • http://pixoriwabivonol.rf.gd/higgins_lake_ice_fishing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/tobakuseporimiluxukozes.pdfIn PDF document text
    • http://vesebebiwimana.epizy.com/nozil.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_off0000f152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF152 5696 bytes
SHA-256: 7e77d0d82d79c5b8a689e50b0992b98fdee6f6a7f07725796215473e8edb72ab
font_01_sfnt_off000104ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AD 11164 bytes
SHA-256: dfb684cac6bf4d7c004ebd2d74bd869f2271f1eef20b7b30fc5ef11b82cd3b86

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