Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a40465497aeb36a…

MALICIOUS

PDF

73.9 KB Created: 2021-02-07 14:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 00c2ef1199d0c211d11327c2d8def088 SHA-1: 33d64f23f54e1a58971f56e82a2bb9d936f3163f SHA-256: 8a40465497aeb36af65bfd91482a06f824f96d98f2f5ac6c4fdfa647104e2f4e
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://seumenha.ru/aws?utm_term=candy+crush+soda++for+windows+8.+1 PDF link annotation
    • https://cdn.sqhk.co/xufojidaju/7fj6hhx/big_bang_theory_cast_penny_last_name.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/hTGXcjg/zero_vector_definition_geometry.pdfIn PDF document text
    • http://sigorododosub.iblogger.org/bududozufujulubomiperasuk.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/bEeHg0Z/83736684233.pdfIn PDF document text
    • http://xasujaru.22web.org/gds_committee_report_latest_news_2018.pdfIn PDF document text
    • http://vadudidubiv.iblogger.org/risk_response_strategy_template.pdfIn PDF document text
    • http://babubusawase.22web.org/android_games_coming_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mevetilozavasep.epizy.com/pacchetto_cumulativo_aggiornamenti_windows_7.pdfIn PDF document text
    • http://zapuwoz.epizy.com/stem_cell_therapy_for_heart_disease.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/kambal_katinig_o_klaster_worksheet.pdfIn PDF document text
    • http://xipipowateselok.epizy.com/nuvubovubosarugaran.pdfIn PDF document text
    • http://paxubar.rf.gd/likiwozak.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/python_3._6_for_redhat_linux.pdfIn PDF document text
    • http://kitukogoxav.epizy.com/archer_installation_guide.pdfIn PDF document text
    • http://jedenibiripo.epizy.com/esl_reflexive_pronouns_worksheets.pdfIn PDF document text
    • http://mapexas.epizy.com/fupasugalodi.pdfIn PDF document text
    • http://mirajiletumumi.epizy.com/19._2_minimizing_solid_waste_answer_key.pdfIn PDF document text
    • http://ravuxigud.epizy.com/affinity_photo_crack_free.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_off0000e04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04A 5452 bytes
SHA-256: e91f1e0d6e7d3959de02b5c9f8115b1ea38d64d61c30515946f319c8d87d73fc
font_01_sfnt_off0000f2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F5 11288 bytes
SHA-256: dbb87e1389f03e68bc494a933cd32c8de116d040312b2f46d5a36986c060c994