Malicious PDF — malware analysis report

Static analysis result for SHA-256 06241f82046fc07e…

MALICIOUS

PDF

85.4 KB Created: 2021-03-02 00:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b6602680c58092b81e8bd634f32fae0d SHA-1: ff63d4e35fbc5387dde338a4fe844eff8acc4ac2 SHA-256: 06241f82046fc07e66160caba4a5f6fb22eb96b84c2baff34f66d878f0f37a9a
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malicious redirection attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=42+sub+zero+refrigerator+dimensions PDF link annotation
    • https://cdn.sqhk.co/petawelesup/jTEuiaa/marketing_jobs_in_atlanta.pdfIn PDF document text
    • https://cdn.sqhk.co/melivetipi/2Tgfigi/95796290919.pdfIn PDF document text
    • https://cdn.sqhk.co/totimujid/bElTjcK/kannada_videos_for_whatsapp_status_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/khghcji/crossword_solver_apprehend.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/gcjdqhe/558238256.pdfIn PDF document text
    • https://cdn.sqhk.co/neliwuwo/hcKs8sZ/99973099325.pdfIn PDF document text
    • http://subeziti.22web.org/cleaning_services_business_plan_template.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/jfnihb9/monkey_wrench_song_lyrics.pdfIn PDF document text
    • http://d-youtube.com/what_is_a_self_destructive_personalityvl3xj.pdfIn PDF document text
    • http://vinamituloj.22web.org/how_much_is_a_train_ticket_from_dover_nj_to_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/wcHjgjh/bitagedapijiziza.pdfIn PDF document text
    • http://sutiwejepeb.22web.org/adobe_flash_player_version_11._1_0.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/sinadi/86803548186.pdfIn PDF document text
    • http://wigezenefibi.epizy.com/21162574388.pdfIn PDF document text
    • http://riwexakax.epizy.com/broadsheet_brunswick_dinner.pdfIn PDF document text
    • http://surotatifezuxe.rf.gd/linivezabukixeb.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/diablo_3_season_21_necro_mage_build.pdfIn PDF document text
    • http://xasobanezifo.rf.gd/free_winrar_archiver_for_windows_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/capacity_to_contract_indian_contract_act.pdfIn PDF document text
    • http://benebobuku.epizy.com/andrea_camilleri_libri.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_off00010de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE2 5512 bytes
SHA-256: b08fe91e44bbe5e2ab204f17074d3c3310647e11e16c93ed3e8085dd555f5106
font_01_sfnt_off00012094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12094 11612 bytes
SHA-256: a5e6ac588675d8c25ef9c03d4af766c3aa08e5a0ddff5559fac19ae1a5b6a22f

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