Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d24c6526f052578…

MALICIOUS

PDF

108.8 KB Created: 2021-05-13 08:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: aaf0dbf70a16a5687e43aacb5e7fcd85 SHA-1: 559fe91b64b1bfe4ad499e799ba1174089724ba2 SHA-256: 1d24c6526f052578f797cc9a4c58db7a5c64317ee2f3322fe5dde93572a1c81f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://xajibur.ru/strik?utm_term=can+roku+2+be+updated PDF link annotation
    • http://beritox.medianewsonline.com/curso_de_numerologia_tantrica.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/fVjfibf/u_mobile_prepaid_plan_unlimited_call.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/9mnhamt/11436667573.pdfIn PDF document text
    • https://cdn.sqhk.co/dajusonas/idNZiih/tale_of_jumping_square_birds.pdfIn PDF document text
    • http://torchqbfl.fun/frankenstein_victor_quotes9hc17.pdfIn PDF document text
    • http://malafasa.iblogger.org/2_bedroom_apartment_floor_plans.pdfIn PDF document text
    • http://gezoxapawelu.22web.org/ximep.pdfIn PDF document text
    • http://tejasatobes.medianewsonline.com/3565777962.pdfIn PDF document text
    • http://jepisafidezegun.scienceontheweb.net/it_was_a_dream_poem_analysis.pdfIn PDF document text
    • http://lizubujakus.22web.org/the_voynich_manuscript_by_unknown.pdfIn PDF document text
    • http://sovetnik53.ru/judge_judy_bailiff_payrr5d2.pdfIn PDF document text
    • http://getyourscore.info/thoracic_ectopia_cordis_case_reportpuy6e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejajubuwuwo.rf.gd/ancient_civilization_of_china.pdfIn PDF document text
    • https://bfb79b04-db4d-4c54-a74a-4733ff68ceb9.filesusr.com/ugd/11291b_718b37882a5c45ecb0b8c35de73d57d8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6d02168-f825-4677-b103-ce2eb2e5d46a/secret_dunkin_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/148bd001-0d97-4fc6-a2e9-b61cd7fc2528/what_layer_is_tcp_ip_osi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f6e55b6-fb15-4149-8507-91662406a877/how_to_access_secret_service_menu_for_all_samsung_tvs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd26f2ee-f064-4df3-8724-8de4e697b485/system_of_equations_and_inequalities_test_answers.pdfIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_431bde1e545144b6a721e8a024362001.pdf?index=trueIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_bd6e8073f89c4f3d84a578d221fe5841.pdf?index=trueIn PDF document text
    • http://xewojof.rf.gd/dajiluk.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_off00016d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D3E 4984 bytes
SHA-256: ae0787cfdf6e96490ca840ecbdfaa800ce6811194807bddca79134b854297b33
font_01_sfnt_off00017e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E37 11752 bytes
SHA-256: 9af76d00e66866b73cca99c0448dd51fdf3656fb55e91f4025a6990b0b8f0d9d

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