Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00991e8b0ef3321…

MALICIOUS

PDF

72.1 KB Created: 2021-02-17 06:37:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fe3478a3bfe948d6986be8bebc03be61 SHA-1: 13e71184eb195db7f0e33e46a6399f5c6df63c8b SHA-256: c00991e8b0ef3321e055655d9bf143b84dd5b59b2da225e195af3e0ba094ccf2
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://seumenha.ru/wix?keyword=agogic+accent+symbol.
  • 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=agogic+accent+symbol PDF link annotation
    • http://luxshop21.site/rarikozamatetezevgl4a.pdfIn PDF document text
    • http://rukozhop-guide.com/get_more_followers_on_instagram_free_appzh92e.pdfIn PDF document text
    • https://cdn.sqhk.co/sufokorume/jbjO8ie/how_to_fight_sisters_of_battle_hollow_knight.pdfIn PDF document text
    • http://deutschebank-meine.com/nutevakopisumixapilkh2h9.pdfIn PDF document text
    • http://winoorama.space/wifi_file_transfer_pro__androidwnt40.pdfIn PDF document text
    • http://idealica-uficiale.website/hp_color_laser_printer_cp1215_manual4mqob.pdfIn PDF document text
    • http://antileqphh.site/zarizemfg94c.pdfIn PDF document text
    • https://cdn.sqhk.co/zajagatetode/fiiMchg/k12_online_school_michigan_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/lepemafe/bgj9x3D/amc_the_walking_dead_world_beyond.pdfIn PDF document text
    • http://indonesia2health.online/trouver_le_complment__la_dizaine_suprieurexv7br.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fusiwati.epizy.com/45908507276.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/modul_akuntansi_keuangan_menengah_2.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/apocalypse_world_system.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/avery_8195_template_mac_word.pdfIn PDF document text
    • http://kovefevejafuk.epizy.com/android_5._0_root_no_pc.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_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 5256 bytes
SHA-256: fcea69adb45e2fd8d82ca154db56fe80f7a539fab29bc6574ec4e537b142fa73
font_01_sfnt_off0000ed87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED87 11724 bytes
SHA-256: caa2d67b79d430e33c91fc80853c0cfb4c3b42f44991c84cdbc5f5783c41919f