Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71527914a260975…

MALICIOUS

PDF

67.0 KB Created: 2021-01-21 15:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ff46fc6688c5d28d857bef12e3c44afe SHA-1: d77ed9fea00360265581a0057f54ec8fc25bcccf SHA-256: b71527914a260975d878e457e3f1be4e462289b6fdaa4e1a1c50fb329e56865b
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=galaxy%20sky%20shooting%20mod%20apk%202.%200.%2011 In PDF document text
    • https://cdn.sqhk.co/vuwonesi/2JjbvMQ/chat_vr_fun.pdfIn PDF document text
    • https://site-1171384.mozfiles.com/files/1171384/halloween_costumes_for_kids_girls_target.pdfIn PDF document text
    • https://kafolegilu.weebly.com/uploads/1/3/2/3/132303068/devupo.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/8wIZPGU/nanirate.pdfIn PDF document text
    • https://jugurapofan.weebly.com/uploads/1/3/4/3/134339640/780d57c8944.pdfIn PDF document text
    • https://site-1204816.mozfiles.com/files/1204816/sifegudufisidofuxu.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/ibHSzyU/pogelidafitu.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/hbubAjg/tiny_decks_and_dungeons_tips.pdfIn PDF document text
    • https://site-1174695.mozfiles.com/files/1174695/25871856965.pdfIn PDF document text
    • https://cdn.sqhk.co/kunutewiwit/jdI8ejj/origami_box_easy_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujonad/ghhc7ha/2990757561.pdfIn PDF document text
    • https://site-1167925.mozfiles.com/files/1167925/notes_in_sheet_music_piano.pdfIn PDF document text
    • https://jepigosewuva.weebly.com/uploads/1/3/2/3/132302921/7331262.pdfIn PDF document text
    • https://site-1182839.mozfiles.com/files/1182839/smokin_ball_bowling_2nd_hand.pdfIn PDF document text
    • https://site-1229287.mozfiles.com/files/1229287/danojixusada.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_off0000c78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78C 5900 bytes
SHA-256: 7f59b9f30d19a37e6f8cf80233b7501b30de732cd5fb2a1a59e5dc2a8ff8e9be
font_01_sfnt_off0000db9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9D 10404 bytes
SHA-256: 0880ca4a8092cee37485ae9a7df84a60ac9531d92c0738459dbdce2a2f26cfa8