Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d99b14756b2da7c…

MALICIOUS

PDF

70.3 KB Created: 2021-02-11 21:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b440d5f81a4cebd44262b0df4b3dcf6f SHA-1: c6535f485d8941d21c3e18218036dfd6763ab8f7 SHA-256: 8d99b14756b2da7c21daf555d72845b31d19a007cecc592b803af4bcfa066434
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://bologen.ru/wb?keyword=conversions%20dimensional%20analysis%20chemistry%20worksheet PDF link annotation
    • http://ndfnasg.xyz/apache_maven_windowsdbfp3.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/hiigib4/auto_accident_near_me_today.pdfIn PDF document text
    • http://yourdesk.website/25193287994qawqd.pdfIn PDF document text
    • http://ketosimple.online/cladogram_worksheet_answers_human_snake_monkey_lizardbx4mp.pdfIn PDF document text
    • http://familyit.info/algebra_worksheets_year_9ahes2.pdfIn PDF document text
    • http://info-pages.ru/long_e_worksheets_printableskz5i.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/jfjcuic/babeminimepadowosi.pdfIn PDF document text
    • http://logoped-samara.ru/balatigijoxofupilf51zy.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/Ry0gejh/68585830960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446377/normal_601c60c6a058b.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/AHCgijd/jodonepuxubezanidubipemax.pdfIn PDF document text
    • http://bighome.space/free_template_cv_kreatif_bahasa_indonesiaj3hpt.pdfIn PDF document text
    • http://hookup154.space/treatment_plan_for_separation_anxiety_disorderbnmug.pdfIn PDF document text
    • http://termometr-medikal.site/rirakiriporivaxs3h96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://demajipo.rf.gd/bangor_sask_weather_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_off0000d688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD688 5400 bytes
SHA-256: f3f29a283763101086d8e91896ea3acbb00ce65654c2823fc2265c3bf0ef2adb
font_01_sfnt_off0000e8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CF 10300 bytes
SHA-256: 2939f60aa0ec7edcb9a1c6525117247ad8e204247ead5b54733a2d104fa77052