Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b461e0c1d6ceb0a…

MALICIOUS

PDF

69.9 KB Created: 2021-02-27 23:22:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e76ddfc2b136167e4c3435a3e8ee7a0e SHA-1: 9c5152e273cec057069537e2cbd9f2f8dc7cb11d SHA-256: 4b461e0c1d6ceb0a0a3a13dd683793df1efb743cba41fa4a96b944d576d86864
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://dafemum.ru/award?keyword=leica+m6+for+sale+australia In PDF document text
    • http://knitfqph.site/breitling_aerospace_e75362_for_saleq3xz6.pdfIn PDF document text
    • http://idealica-ufficiale.site/guxumobelanok5eav2.pdfIn PDF document text
    • http://momentikshop.space/sijuniwavouqwj4.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/ihXbibH/xabavidofutafenapexoj.pdfIn PDF document text
    • http://uscreditreport.info/ritifikonufoljjyif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369509/normal_5fdf7fc18bf2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402478/normal_5feb37284d00a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463005/normal_5fda14d471287.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416791/normal_5ff65c971c7df.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimurami/Dqghhil/through_the_ages_app_sale.pdfIn PDF document text
    • http://centerbluebadge.com/biochemistry_of_protein_and_amino_acid4wz3f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kapirexazi.onlinewebshop.net/twilight_breaking_dawn_part_3_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/tugofafefikinodeb.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/95385836774.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E6 4900 bytes
SHA-256: 76d77b9f1cb1ab3f141d35c54e48ba3abc4ee5ae3ff454f0f8fc0e8933f4cc20
font_01_sfnt_off0000d993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD993 10296 bytes
SHA-256: 80b92f94cc26196346166fc585dcd1dc55f4ddeec6197ce202ed9150ef37e9eb
font_02_sfnt_off0000fce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3