Malicious PDF — malware analysis report

Static analysis result for SHA-256 4120d8b9e5bba68f…

MALICIOUS

PDF

64.8 KB Created: 2021-01-25 08:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 7f19a2784af0b60b2f9410bb2cee68bb SHA-1: a87c36f0f91c7ad6a36edd63c060bd63900e65be SHA-256: 4120d8b9e5bba68f7fd24ac94dc4f95ce2e8094a3a2c1955df0563be3d2f7568
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://yafferge.ru/wb?keyword=tiny%20epic%20zombies%20kickstarter In PDF document text
    • https://cdn.sqhk.co/puvubuzu/jgiieyK/teachers_union_florida_sues.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikebepo/egjSbii/how_to_record_screen_windows_10_xbox.pdfIn PDF document text
    • http://kfnwejfnkwheklf.space/infectious_disease_doctor_tulsacyo3x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481056/normal_5fd275dd4bc97.pdfIn PDF document text
    • http://kitigaw.22web.org/avast_secureline_vpn_licence_file.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460725/normal_5fd63f1fe3d0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372399/normal_600a53a8b6de9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471719/normal_5fe90d3d5b6ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485935/normal_60065d53b9d61.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/2ifBicE/61028203180.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://voferinokubusob.rf.gd/mustache_template_if_true.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/que_es_un_aneurisma_aortico.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/azure_stack_development_kit_deployment_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/bullet_basya_kannada_hd_film.pdfIn PDF document text
    • http://bolunivagoxel.epizy.com/dj_remix_song_tamil.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_off0000c207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC207 5352 bytes
SHA-256: 9fb1f003a259314a347525ca0c5ded15c602891701c84502f92a2d5bb7725ea8
font_01_sfnt_off0000d436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD436 10052 bytes
SHA-256: 06734a2146d5c255a7c299ced1a1090c71afb79153d254692d531758206db19f