Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6598dde92d158f8…

MALICIOUS

PDF

75.6 KB Created: 2021-01-26 19:12:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b9c831882fdcde48ffd12e03bfb38767 SHA-1: 2cb319c0df9fc73b04b571a44d5a3ec926bc2a8e SHA-256: d6598dde92d158f8ab7706e88d1658f83776f9004db54f85f9a0b7b1eeb9849c
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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/123?utm_term=i+should+have+known+that+game+expansion+pack PDF link annotation
    • https://cdn.sqhk.co/suxupijisajo/mogd3gj/bypass_android_pattern_lock_screen_using_cmd_2015.pdfIn PDF document text
    • https://wugumura.weebly.com/uploads/1/3/4/6/134601103/182ca2b3c0f0799.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/e2iieii/squad_free_fire_epic_survival_battlegrounds_3d_download.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/kapideto/jawidgi/mortal_kombat_armageddon_all_skins.pdfIn PDF document text
    • https://guxulixekakuved.weebly.com/uploads/1/3/5/2/135294256/xubefabi.pdfIn PDF document text
    • http://kuxogajow.iblogger.org/basics_of_ms_excel_2013.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/hgfjhQv/sonejolebakaxew.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/sitiwufim.pdfIn PDF document text
    • https://funavekun.weebly.com/uploads/1/3/0/9/130969801/4085414.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/ahggdgg/20911793757.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/INvgcjh/24348366607.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/4Fpgd2j/download_game_car_simulator_2_cheat.pdfIn PDF document text
    • https://cdn.sqhk.co/zokoxirinuz/Qigvl6o/chinese_drama_eng_sub_list.pdfIn PDF document text
    • http://moneymaya.site/edjing_mix_dj_music_mixer_apk_downloadwb6nl.pdfIn PDF document text
    • https://cdn.sqhk.co/tikikizeveni/KDigtVU/motor_vehicle_registration_office_near_me.pdfIn PDF document text
    • http://kabonuwumew.66ghz.com/divenire_einaudi_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/ggjaifF/12081985574.pdfIn PDF document text
    • https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/1353626.pdfIn PDF document text
    • https://wugumura.weebly.com/uploads/1/3/4/6/134In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82F 5612 bytes
SHA-256: 93d5e097c82792ab9cd739f069154843c5c17379a066d787b7c9075aa9ee6e52
font_01_sfnt_off0000fb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3F 11320 bytes
SHA-256: 1cdb096acb74511410f309afdedd73a059d86a66cefaf17651c7c6e354261f83