Malicious PDF — malware analysis report

Static analysis result for SHA-256 1289ad2a3b582fcc…

MALICIOUS

PDF

71.6 KB Created: 2021-02-11 17:52:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a36bfabacc1cbf2920e13db1360890b6 SHA-1: 8ef7494f46d5bed9fb604e046e2273352e9e12db SHA-256: 1289ad2a3b582fcce7db6e60f011cc92802d3788c368022a90db1325d9a96ac7
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=what+is+experimental+probability+in+mathematics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372983/normal_5fe440331d3b0.pdfIn PDF document text
    • https://cdn.sqhk.co/kupovite/0ziiUgc/43617068794.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/canada_food_guide_french.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/60148332249.pdfIn PDF document text
    • http://xugafigipi.22web.org/36557760057.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/dNehaiW/nuclear_war_card_game_online.pdfIn PDF document text
    • http://taxurofetizi.22web.org/riparian_zone_management_guidelines_tp148.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/bowmaster_guide_mapleroyals.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://posijibanif.epizy.com/ximevifuvuwevidaviwidid.pdfIn PDF document text
    • http://sonisan.epizy.com/arx_fatalis_character_creation_guide.pdfIn PDF document text
    • http://fabupumow.epizy.com/live_tv_apk_for_android_2._3.pdfIn PDF document text
    • http://kexomuradalo.rf.gd/procd_de_contact_acide_sulfurique.pdfIn PDF document text
    • http://mezomiwewelebe.epizy.com/it_act_intermediary_guidelines_2011.pdfIn PDF document text
    • http://kiwozoma.epizy.com/block_sites_from_google_search_android.pdfIn PDF document text
    • http://zevizajezu.epizy.com/rexoxe.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_off0000d85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85F 5496 bytes
SHA-256: 1049f050194d675caa45f0e680ba85b0f0c44d40f065edbed0ea875152240871
font_01_sfnt_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 11780 bytes
SHA-256: a037f30db1e7e77dab8eb689b678f7a1ab18bb445ab0b7c1793d4dc26e75233d