Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91b873cb48af545…

MALICIOUS

PDF

82.1 KB Created: 2021-02-26 11:09:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 44dfcb92699b13604c528389619897f0 SHA-1: 99f3c6c24df87e88ff7b8dc41db71096a44b2c43 SHA-256: b91b873cb48af5450c0e699a356fe3c10583e8dda3dab2ff9f3cb081333f0725
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://gimoguvi.ru/award?keyword=chopin+prelude+6+analysis PDF link annotation
    • https://cdn.sqhk.co/towevefizub/e4Idiji/79649531103.pdfIn PDF document text
    • http://generatorsale.ru/nutujebuwevezekegifew4z1of.pdfIn PDF document text
    • http://wumorumomu.22web.org/js_regex_cheat_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/hcuGjer/6660700775.pdfIn PDF document text
    • http://gerisekazaleg.22web.org/ruzumusibuxevenafamur.pdfIn PDF document text
    • http://coins24h.com/louisville_slugger_blue_flame_upm_45_ultimate_pitching_machinehdow7.pdfIn PDF document text
    • http://aduo5.online/rukodovowobuwuxoxarigapav1unmz.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/where_is_the_furnace_filter_on_a_goodman_furnace.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/ib4t3jg/legabenokinokovomof.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/lean_manufacturing_tools_in_hindi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://badisaxutut.rf.gd/motorola_moto_one_android_one.pdfIn PDF document text
    • http://pibusobi.epizy.com/lowisukefekebigibefobobi.pdfIn PDF document text
    • http://nekogepi.epizy.com/39244054298.pdfIn PDF document text
    • http://fipegaz.epizy.com/90810589927.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/yellow_tail_chardonnay_nutritional_information.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_off000105c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C6 5208 bytes
SHA-256: df6f56f6bb99aa2fff730051a2d5d37081eb8f2770136477140c8df5195f16bd
font_01_sfnt_off00011772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11772 10688 bytes
SHA-256: 761b74613861e1cac6b74d1724b089f4a2c37c6973547c1c5f0f3c9754ccd6a4