Malicious PDF — malware analysis report

Static analysis result for SHA-256 66a2aaff6796fdd8…

MALICIOUS

PDF

71.5 KB Created: 2021-02-13 22:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1a6ed4cba1a458849be5ce68ab8c0080 SHA-1: 086b927ca62af2d1fa7448607b393b57ceda241b SHA-256: 66a2aaff6796fdd8945c5af0e22c6651960cb7e89e8ea88ee3a08bb153fc299d
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://seumenha.ru/wix?keyword=oceans+of+apk+minecraft PDF link annotation
    • https://cdn.sqhk.co/dusaradezat/hfr40NB/arkham_horror_card_deck_building.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/gSI4Ajf/word_search_creator_app.pdfIn PDF document text
    • http://vivadoctor.ru/jasperreports_server_community_edition_licenseois6p.pdfIn PDF document text
    • http://rmk4sale.xyz/cute_animal_gifs_cartoon72qt6.pdfIn PDF document text
    • https://cdn.sqhk.co/tuvameboroke/1jjljbW/endless_run_temple_legend_3d_model.pdfIn PDF document text
    • https://cdn.sqhk.co/nosamese/c7jciiK/with_heroes_idle_rpg_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ritafase/4hhIUgf/vitamin_d_benefits_for_women_s_health.pdfIn PDF document text
    • http://madamzero.com/56447155319dehpb.pdfIn PDF document text
    • http://repair-kompov.ru/dr._driving_game_for_pc2buza.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/ajghjen/80457130746.pdfIn PDF document text
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/6a3397622e50a38.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/rTBjcjj/xomotum.pdfIn PDF document text
    • http://hr-insider.com/sushant_singh_rajput_ringtone_pagalworldk29sy.pdfIn PDF document text
    • https://lufodeku.weebly.com/uploads/1/3/4/5/134586195/2376703.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/jOgcZBv/comic_book_app_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/vaxigisonejesaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/homecine_apk_full.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/xebebezabebov.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_off0000db80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB80 5220 bytes
SHA-256: c8e6f872683d410a2efa31476f3036270e5f9be49bada7cae5aeb10f54db1501
font_01_sfnt_off0000ed34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED34 10464 bytes
SHA-256: 1925f763a8e324afc83e02089804eba27999e675241af9481100819db30b4713