Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74163fcedcf627c…

MALICIOUS

PDF

80.2 KB Created: 2021-06-06 06:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fa1be7fd2903aa5733088203c0a6b57a SHA-1: dd69cf3afb53174c402d3fe3532504ea99403242 SHA-256: a74163fcedcf627c8ebd561e367bb0e2cc8174eb2e8e3ca8bd0d6a0a1d837065
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://laborke.ru/pbw?utm_term=powerpoint+template+design+free+download+2019 PDF link annotation
    • https://lelamezabam.weebly.com/uploads/1/3/5/3/135314793/sodevamudolewim-xizakalu-tepisubizapej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422368/normal_6024c32ce85f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410462/normal_60215fda1e1c6.pdfIn PDF document text
    • https://zilibadokaji.weebly.com/uploads/1/3/2/6/132680781/ravakexoful.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/razepigemexeze_pepokokozoj_viwavunumu_xifegubeponexar.pdfIn PDF document text
    • https://dewisepiremutu.weebly.com/uploads/1/3/4/3/134318599/4086011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466408/normal_60405c84e843c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475739/normal_60407a0730caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5fd77ddb481fd.pdfIn PDF document text
    • https://kunidaput.weebly.com/uploads/1/3/4/7/134766790/woxobotipiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403428/normal_5ff76634b4b97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wenuveraroto.pbworks.com/f/mechanical_fastening_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/594a96fb-cd5b-473f-8798-9e8ef26f726d/que_es_fotos_tumblr.pdfIn PDF document text
    • http://giwupiraride.pbworks.com/w/file/fetch/144455229/how_does_twin_tub_washing_machine_work.pdfIn PDF document text
    • http://lururefisu.pbworks.com/f/sefak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9941a5a-cdd6-4d22-a59a-8d8d44e4e66d/44572376769.pdfIn PDF document text
    • http://noxiwako.pbworks.com/f/culturally_responsive_teaching_and_the_brain_chapter_summaries.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/f/ielts_reading_general_training_test_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5d852db-1bd5-4eaa-80b4-15b1a9956cb3/relato_de_un_nufrago_libro_completo_gratis.pdfIn PDF document text
    • http://vowujepojez.pbworks.com/w/file/fetch/144566205/xujosatixepuwejawuxu.pdfIn PDF document text
    • http://kibumezi.pbworks.com/w/file/fetch/144453255/how_to_get_geometry_dash_2.2_for_free.pdfIn PDF document text
    • http://zosajivapesi.pbworks.com/f/how_can_i_download_gbwhatsapp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5269fdf-c633-4a1a-b15d-7d3026e54016/loruziji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5baa04fd-daab-4da8-9e3c-138a00aec9e0/management_information_systems_managing_the_digital_firm_15th_edition_free.pdfIn PDF document text
    • http://lebamojopa.pbworks.com/f/29557213173.pdfIn PDF document text
    • http://pekazaxe.pbworks.com/w/file/fetch/144646770/administracion_estrategica_thompson_resumen.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_off0000f9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B2 5936 bytes
SHA-256: 24b42562b5fd9a3beef52f64b3a3521ccfe810445df4f9750f5e6b28ec277c24
font_01_sfnt_off00010de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE6 11136 bytes
SHA-256: 9a5afcf83c2d3d19e051b4481c8ec1ee828e8b0093fe2810f5da974d05219a7b