Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4776e22a777cde…

MALICIOUS

PDF

82.0 KB Created: 2021-03-18 03:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a07d738a65b93ad21b39390e3f0d9553 SHA-1: 7f0e7ea99050a302541960f381902e54ca3ea8c0 SHA-256: 8d4776e22a777cde241941a3340631678f7f4cb9b2ed51205d82da777690d7ca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://vilenefex.ru/wix?keyword=modded+apk+sites+2020` suggests a lure to a website offering modded APKs, a common tactic for distributing malware or phishing. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=modded+apk+sites+2020
    • https://cdn.sqhk.co/bisadumiza/xyAij1z/spreadsheet_for_tracking_expenses.pdf
    • https://cdn.sqhk.co/karadirimose/hhhghuE/54612143806.pdf
    • https://cdn.sqhk.co/kinifukix/bhhPjbT/mancala_original_rules.pdf
    • http://takipibimaxubov.sportsontheweb.net/coleman_roadtrip_grill_parts_manual.pdf
    • https://cdn.sqhk.co/fefowofuk/jjgfZjf/download_stickman_wizard_mod_apk.pdf
    • https://cdn.sqhk.co/kixagixupo/iliezje/panuwimepebi.pdf
    • https://cdn.sqhk.co/senepaderu/0jGIqhh/52332302315.pdf
    • http://rasudilikid.mywebcommunity.org/kimepuzajuxomaga.pdf
    • https://cdn.sqhk.co/sowodopevew/jgd1ieX/movie_creator_software_for_pc_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tipikaxe/plan_de_estudios_2011_tercer_grado_sep.pdf
    • https://s3.amazonaws.com/zaxefemebidaz/tableau_book_font.pdf
    • https://s3.amazonaws.com/toniseligiwuzux/41258985996.pdf
    • https://uploads.strikinglycdn.com/files/661ed11f-da57-43f7-a1d8-8a138518b267/92642879440.pdf
    • https://uploads.strikinglycdn.com/files/d7d862b5-9990-4eb6-8c7e-f5968fa8f897/26214548810.pdf
    • https://uploads.strikinglycdn.com/files/7aecb35e-d295-4dfe-84f5-5b16f5b771cf/pilazetaxojezekidibojufo.pdf
    • https://uploads.strikinglycdn.com/files/5ce08e72-7133-452b-bcee-8124eb5429b3/by_the_waters_of_babylon_short_summary.pdf
    • https://uploads.strikinglycdn.com/files/06d52985-2aa7-49b0-992d-ca5008ebf95d/how_do_i_know_if_my_cpu_is_compatible_with_my_motherboard.pdf
    • https://uploads.strikinglycdn.com/files/b80b320f-e768-48a9-803c-9f22735b4037/38933637575.pdf
    • http://ginowane.onlinewebshop.net/samsung_galaxy_note_20_ultra_in_india.pdf
    • https://s3.amazonaws.com/setaxilitozuko/32163853316.pdf
    • https://uploads.strikinglycdn.com/files/285b1100-425b-44fe-a8c9-0bb5b017bf0e/aquasource_kitchen_faucet_cartridge_replacement.pdf
    • https://s3.amazonaws.com/zolerazowubow/go_ahead_singapore_annual_report.pdf
    • https://uploads.strikinglycdn.com/files/439a9eb1-dfd7-4d95-b12c-295cd6989596/how_to_use_the_bissell_proheat_carpet_cleaner.pdf
    • https://uploads.strikinglycdn.com/files/d5619b4b-c3d5-4b51-b707-c3f9c9555ca2/jisipararok.pdf
    • https://uploads.strikinglycdn.com/files/ede99f1a-b7d2-4d5f-928d-b65a8c1b0322/50945284861.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5e5.bin
c993a144d4317c1154c11e7086fd74394a8fb17728d13eaf869f35a4628cc97a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E5 4852 bytes
font_01_sfnt_off00010678.bin
5f754d52879157dbf668c961c25add0e32f287ff096bab6d16061f3512254787		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10678 11252 bytes
font_02_sfnt_off00012c92.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C92 4324 bytes

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