Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1cfd9fe3f4cacc7…

MALICIOUS

PDF

67.4 KB Created: 2021-02-08 22:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 507c07c0b3f817afc4b8fd731c10c0cf SHA-1: 5715a18eb89e4652cd2c80adfdc151a7581197cd SHA-256: b1cfd9fe3f4cacc7729c6167cc28c1b6f21723b36b38a1f170d683b6a6f04d2f
126 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
  • 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://druttle.ru/wb?keyword=curious%20cat%20apk PDF link annotation
    • http://idclick.cash/messenger_apk_uptodown_para_android8vqop.pdfIn PDF document text
    • https://tobadagagu.weebly.com/uploads/1/3/4/7/134750152/96a7e4.pdfIn PDF document text
    • https://sovurides.weebly.com/uploads/1/3/5/3/135349611/45713b.pdfIn PDF document text
    • https://cdn.sqhk.co/femaxozimom/nqhcajd/82253016506.pdfIn PDF document text
    • http://salleop.xyz/uos_challan_form_for_degree_issuancehgzox.pdfIn PDF document text
    • http://pixxel.life/lusadovotofogagediga1sp4h.pdfIn PDF document text
    • http://mavito.online/770974111012l4k9.pdfIn PDF document text
    • http://pubgmobiie.com/66680725492bnsah.pdfIn PDF document text
    • https://cdn.sqhk.co/zevukodixu/iggjchb/xolipusejubiliwigaviwev.pdfIn PDF document text
    • http://onlinesos.tech/baseball_tournament_budget_template3nzvd.pdfIn PDF document text
    • https://minezutoka.weebly.com/uploads/1/3/2/6/132695516/wekugoletal_vexadapu_zalerexuv_giluvamis.pdfIn PDF document text
    • http://trokot-new.online/paxoxomist5fd6.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/SjhijU3/free_font_generator_for_commercial_use.pdfIn PDF document text
    • https://fisujurij.weebly.com/uploads/1/3/1/4/131437504/2050598.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/oculus_rift_s_spec_sheet.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_off0000c891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC891 4864 bytes
SHA-256: 1c3323daf14e7a893ebeb2a969e3ac5c33338ccb6da33199882792bc20e90e1f
font_01_sfnt_off0000d92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92B 13384 bytes
SHA-256: f4270d91c57ae4cc28b734a07dedb442ac434c3fe23b9428d445fae3f2b67468