Malicious PDF — malware analysis report

Static analysis result for SHA-256 f523859a648f0fdb…

MALICIOUS

PDF

70.6 KB Created: 2021-02-23 11:08:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8957ab89a585efd70bf8694be6e2006e SHA-1: 152bde0090eff08c040e1a65cf27ee0c81f2b4c9 SHA-256: f523859a648f0fdb3e2f521dfb59c5986f198ec2b9c6105165c27e3a8cdd67c6
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://crophysi.ru/wb?keyword=derechos%20humanos%20traduccion%20ingl%C3%A9s In PDF document text
    • https://cdn.sqhk.co/modonasuje/jiifjiy/61038237196.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/hVmihzQ/zexebaniziba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379234/normal_6026cd10cc8c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_602c50d812d2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458621/normal_5ff24a4a07b3f.pdfIn PDF document text
    • http://tuwafanumi.iblogger.org/dish_anywhere_app_for_computer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_6011dfc193a9d.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/jijhWij/fishing_break_tips.pdfIn PDF document text
    • http://rufafepikawaj.22web.org/millionaire_teacher_review.pdfIn PDF document text
    • http://gopururin.iblogger.org/assistant_branch_manager_interview_questions_and_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lejokadedemixo.rf.gd/rafememesagupewes.pdfIn PDF document text
    • http://mirabawuwoku.epizy.com/16663257799.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/radar_beamforming_algorithm.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/attribute_changer_for_windows_7_free.pdfIn PDF document text
    • http://wekapalipewux.epizy.com/roxovusuronuj.pdfIn PDF document text
    • http://nuzavaxevarap.epizy.com/90741220178.pdfIn PDF document text
    • http://sajipesexadagon.epizy.com/mobile_app_design_templates_2018.pdfIn PDF document text
    • http://dujazenemelix.epizy.com/25484683865.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_off0000d354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD354 5496 bytes
SHA-256: 48c5c29043e7a548d5104994d348e4f5dde19a9428924bd3b96804ef6c1cfef6
font_01_sfnt_off0000e592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE592 11616 bytes
SHA-256: f0760512358d41b02eefc203f76286e7de02613c6f798c1b7ee56a9939bdfc34

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