Malicious PDF — malware analysis report

Static analysis result for SHA-256 771009d5a81e5758…

MALICIOUS

PDF

67.9 KB Created: 2021-02-06 15:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 44993d32bb19e17f236d966337500fe5 SHA-1: cb036f7318980210142610103d28265b9f755e99 SHA-256: 771009d5a81e57587cf301ab2d606a5e42482878bbd8a981930d41c6b633464c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wb?keyword=hallelujah%20chorus%20sheet PDF link annotation
    • https://cdn.sqhk.co/rugofufol/Z6iiHhh/best_ninja_air_fryer.pdfIn PDF document text
    • https://wexipemeb.weebly.com/uploads/1/3/4/8/134860193/952663.pdfIn PDF document text
    • http://mobevusujezuno.22web.org/crsu_bed_1st_year_date_sheet_2019.pdfIn PDF document text
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/bde729f85597b8.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/byvQBgc/learn_carpentry_and_joinery_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_6018be49a80e0.pdfIn PDF document text
    • https://cdn.sqhk.co/mavixuwaloz/i6ihjaE/nbc_sports_philadelphia_flyers_postgame.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/Qhe3qid/the_diplomat_2009_full_movie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486346/normal_5fcbe236ea7f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446930/normal_5ffa66f8c0104.pdfIn PDF document text
    • http://dommasters.site/17804344834y599t.pdfIn PDF document text
    • http://giocodigital.website/android_graph_view_plotting_libraryt1b1o.pdfIn PDF document text
    • https://cdn.sqhk.co/dolubivo/gh1icwQ/download_game_stickman_annihilation_5_mod_apk.pdfIn PDF document text
    • http://bepebeku.22web.org/38105830372.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gexazavere.epizy.com/best_resume_templates_with_photo.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_off0000ca8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8B 4924 bytes
SHA-256: 9cadded581d1fccf47aaddda477bcc866a8013b9dda7f4cbd8c6858878236159
font_01_sfnt_off0000db3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3F 11992 bytes
SHA-256: e2bad853bbc0fac9d3698acbbf0054dc50e300fd6038b7be10b5f73c321f0bf0