Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a31cdbe39ad6669…

MALICIOUS

PDF

72.3 KB Created: 2021-02-10 11:37:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 87eb5033bf897e385e47a1936ef03b0f SHA-1: ae31f4d13eaf8a53284b598f0ac3858169263ae8 SHA-256: 4a31cdbe39ad6669545ab53b88ebf9b4de19eed966e57db8e108326c3068bb00
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wb?keyword=bidaai%20song%20video PDF link annotation
    • https://cdn.sqhk.co/zogobadakedu/hgjd1ii/big_baby_toy_story_doll.pdfIn PDF document text
    • http://pollsexpert.com/aster_flower_information_in_kannadafydb2.pdfIn PDF document text
    • http://hangookoil.ru/roderuposomizugemuwiaikh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452372/normal_5fd2c7bcea627.pdfIn PDF document text
    • http://ehaberdevlet.com/calculus_3rd_edition_strauss_bradley_smith_downloadmwkw6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479439/normal_601fd1f16bb48.pdfIn PDF document text
    • http://roskycnmx.com/zaderabilinalonr50s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468814/normal_600bcad7b5326.pdfIn PDF document text
    • https://cdn.sqhk.co/garoresolif/whcwTij/mixireselafomererawuk.pdfIn PDF document text
    • https://cdn.sqhk.co/kizulajeli/mu7geis/bricks_and_balls_flash_game.pdfIn PDF document text
    • https://cdn.sqhk.co/lotivadafe/ighbpE2/norizofamamarenoz.pdfIn PDF document text
    • https://cdn.sqhk.co/timemowab/jg1gciO/voice_lessons_syntax_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofujuluzode.epizy.com/p_f_m_s_ka_full_form.pdfIn PDF document text
    • http://tosowepexinuf.epizy.com/pamedi.pdfIn PDF document text
    • http://nesitojogosew.epizy.com/heiter_bis_tdlich_hubert_und_staller_episodenguide.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_off0000dd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD40 4972 bytes
SHA-256: a5cc7e584e57e0447390faa73b259ec36013b9c5550a3a3d721d3171a7b847f3
font_01_sfnt_off0000ee48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE48 11512 bytes
SHA-256: 51200ef795efad7c9bccb65955aeff66ac22463bc31708e6e2fc3cb9907f705b