Malicious PDF — malware analysis report

Static analysis result for SHA-256 36bc1c17aee90313…

MALICIOUS

PDF

62.0 KB Created: 2021-01-23 06:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 27106d2ea1e0c9e22bd472e39524baf1 SHA-1: ea71a3303e8c95992ee8f7fa6f10ac922bbf376b SHA-256: 36bc1c17aee903138367a128a71ca0504af2d9994e14e50b784dab9cb5c901fe
126 Risk Score

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://jacksth.ru/wb?keyword=cross%20stitch%20fabric%20walmart PDF link annotation
    • https://cdn.sqhk.co/fopalixogul/iho4jgq/98525559592.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468831/normal_6002e53f74fde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379230/normal_5fe234497fe7c.pdfIn PDF document text
    • https://site-1083549.mozfiles.com/files/1083549/academic_games_equations_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/zopinulepa/hfnhSie/59146311536.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5feb2d1d0eb16.pdfIn PDF document text
    • https://site-1172464.mozfiles.com/files/1172464/kalafob.pdfIn PDF document text
    • https://site-1211292.mozfiles.com/files/1211292/rocket_royale_apk_obb.pdfIn PDF document text
    • https://cdn.sqhk.co/firijanab/A9hhibi/90477668399.pdfIn PDF document text
    • https://site-1179485.mozfiles.com/files/1179485/oscar_nominated_short_film_skin.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/b8Rthjs/74188195512.pdfIn PDF document text
    • https://cdn.sqhk.co/kerosumumato/gjbghhg/pre_listing_checklist_for_sellers.pdfIn PDF document text
    • https://site-1254447.mozfiles.com/files/1254447/anonymous_chat_rooms_mod_apk.pdfIn PDF document text
    • https://site-1177924.mozfiles.com/files/1177924/gonubawete.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483591/normal_5ffc113e347cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000b692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB692 5256 bytes
SHA-256: 75329dbdb5db50cc6c7f88bd4cec16193f31330d966a751b055f88e0c5ce60c1
font_01_sfnt_off0000c85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85F 9852 bytes
SHA-256: 9cd1204bcea8e0df3ea6932ab5e63c4cf3180746a6f5577094896ede05e45b78