Malicious PDF — malware analysis report

Static analysis result for SHA-256 0331d482e7489141…

MALICIOUS

PDF

66.6 KB Created: 2021-02-08 18:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dda39e46aa665b78ecedf46e892c4293 SHA-1: 3c79338f705493958a9c1623403099c7053f445e SHA-256: 0331d482e74891410cfbed5fa06b8d64b253f7c940b2d578201a348caa4a6a5e
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=mobile%20booster%20app%20free In PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/WiiH6rp/tripp_trapp_baby_cushion_install.pdfIn PDF document text
    • http://bnl-jobs.com/intervalos_ejercicios_4_esoqmvpy.pdfIn PDF document text
    • http://zojevonodezidi.iblogger.org/25210463541.pdfIn PDF document text
    • https://cdn.sqhk.co/felinavaw/XjhAij3/candy_crush_saga_download_apk_mirror.pdfIn PDF document text
    • http://teragoronowaki.iblogger.org/enhancement_shaman_leveling_guide_tbc.pdfIn PDF document text
    • https://cdn.sqhk.co/katutilit/8Tfjcgj/tesadur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zepogofeto.epizy.com/job_knowledge_performance_appraisal_comments.pdfIn PDF document text
    • http://vuzogumav.rf.gd/81586647829.pdfIn PDF document text
    • http://tagejoxaluriju.epizy.com/58158975046.pdfIn PDF document text
    • http://pozadel.epizy.com/arnold_chiari_malformation_in_a_pregnant_woman.pdfIn PDF document text
    • http://xumepamef.rf.gd/freelance_graphic_design_website_template.pdfIn PDF document text
    • http://desetezovadu.epizy.com/pamofoxegaxifutoparu.pdfIn PDF document text
    • http://nodibuxirojijok.epizy.com/wirogiwufeki.pdfIn PDF document text
    • http://pewitodekemifu.epizy.com/acas_grievance_investigation_report_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/wpf_listbox_different_template_for_selected_item.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/worksheet_4._6_forms_of_energy_answers.pdfIn PDF document text
    • http://satuvet.epizy.com/example_minutes_of_meeting_template.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/grammar_practice_worksheets_9th_grade_answers.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_off0000c692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC692 5040 bytes
SHA-256: cbfc1368d59f83620eb453c14767137f8daf5054f111f6a030fd7eb16d8b325c
font_01_sfnt_off0000d7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CB 11112 bytes
SHA-256: 1f292746ab5a39eefa81b3c0fa761ccb08f8047c5c30637e864b6f47144a4f83