Malicious PDF — malware analysis report

Static analysis result for SHA-256 b926886d5a0c31b7…

MALICIOUS

PDF

82.7 KB Created: 2021-02-12 21:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 52506097a4716ec71b77aabccde0cd75 SHA-1: 94e4fda70d7dab957bb0e4339732868558aeb5a7 SHA-256: b926886d5a0c31b7203713ac2aa6100b4b40d0195c1930a09afc688320a5834e
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=fauquier+high+school PDF link annotation
    • http://pokypka.xyz/ruvufugokufimu4ud0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380219/normal_5fe04fc78e8f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454170/normal_5ff31d2cdbe6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465538/normal_6009a3f515c0b.pdfIn PDF document text
    • http://godevibusaxinoj.22web.org/aplicativo_netflix_windows.pdfIn PDF document text
    • http://wonnaturila.space/brahmanaspati_suktam_sanskritknefg.pdfIn PDF document text
    • http://reduslimitalia-official.site/paruxixazoxivefikitoweta3yrky.pdfIn PDF document text
    • http://f13x.xyz/voferitazanixaxenojedato11kt1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412767/normal_601cb066728da.pdfIn PDF document text
    • http://50offshop.pro/apology_letter_format_for_schoolfi4w3.pdfIn PDF document text
    • http://wofixizufiw.22web.org/grating_sheets_hs_code.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fikuputo.epizy.com/23507824679.pdfIn PDF document text
    • http://logedulon.epizy.com/ecdl_icdl_advanced_spreadsheets_sample_test.pdfIn PDF document text
    • http://vodupuginotipir.rf.gd/laars_lite_2_pool_heater_troubleshooting_guide.pdfIn PDF document text
    • http://datatoxozapi.epizy.com/8630738308.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/mcgraw_hill_textbooks_answers.pdfIn PDF document text
    • http://pajogapusifured.rf.gd/jigokezeze.pdfIn PDF document text
    • http://ziketikivanodiw.epizy.com/gujarat_industries_power_company_ltd_annual_report.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_off00010602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10602 5144 bytes
SHA-256: 7b28ba6486be021d38dc7285bdac866f291e4061cfa879864bc112de2a302a1b
font_01_sfnt_off00011782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11782 11768 bytes
SHA-256: a2c8f1f90352fdc0258df12f9f25b850bc55e92b516ae46e9591c642d79a9930