Malicious PDF — malware analysis report

Static analysis result for SHA-256 a77c209bb0416616…

MALICIOUS

PDF

66.3 KB Created: 2021-02-24 10:04:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d472c510b3c92e30ee4542b9a40b51bd SHA-1: 22b0138602b89aa380faebcafe0bef5aba0ee89b SHA-256: a77c209bb04166163e56546ba6f831a7d6b84b4a19d744bf7084aa081184e607
126 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
  • 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://leonvi.ru/wix?keyword=incomplete+dominance+and+codominance+worksheet PDF link annotation
    • http://reduslim-ufficialesito.site/climograph_worksheet_garrett_geography_answers5xekp.pdfIn PDF document text
    • http://dkmz2.club/fe_civil_practice_problems_lindeburgug49q.pdfIn PDF document text
    • https://logomeso.weebly.com/uploads/1/3/1/4/131438572/nuxutuxunolawuwaku.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/j3NMze8/smart_tv_50_inch_sale.pdfIn PDF document text
    • http://idealslimitaly.site/5177896415210c4s.pdfIn PDF document text
    • http://yildirimotobursa.com/linkin_park_2020_newsjhhd2.pdfIn PDF document text
    • http://salopkisa.website/baal_veer_episode_130duwlu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374542/normal_5fcdc22a8d807.pdfIn PDF document text
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/2746979.pdfIn PDF document text
    • http://phrensy.co/051_av_stihl_parts0b142.pdfIn PDF document text
    • http://latuha.com/prioritization_delegation_and_assignment_freeesloh.pdfIn PDF document text
    • http://startask.ru/667195480522oqn4.pdfIn PDF document text
    • http://lotto-investclub.com/what_are_the_most_common_project_management_methodologiesljqqk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454822/normal_5fe9f5ce0a08a.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_off0000c8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FB 5404 bytes
SHA-256: cfb7ee0e14c662a2de32a3565fd6af41b686a845c0e912d079af71c32390026c
font_01_sfnt_off0000db40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB40 9580 bytes
SHA-256: 461941622c1cab8f93adab53a43486e9af2666fe7b8b807b92aed087706c2c46