Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f5398673749f62…

MALICIOUS

PDF

72.7 KB Created: 2021-02-21 01:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f7a796200d294fd98ff168095b068475 SHA-1: f8a2ccb373386a80c6daf81143f4fa55f2bf2789 SHA-256: 43f5398673749f62856713e89363f3e2b90aceef35bcc3c1ccaba0b30e6fd304
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://druttle.ru/wix?keyword=tool+library+north+portland PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420934/normal_60265f701f5bb.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/ghyH4jb/remote_server_administration_tools_rsat_fur_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/gcij1ha/idle_city_building_tycoon.pdfIn PDF document text
    • https://cdn.sqhk.co/motixekotet/mHlgtjc/11171548257.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/iicPjc7/radio_shack_computer_history.pdfIn PDF document text
    • http://gomotejux.iblogger.org/cloridrato_de_metformina_500_mg_bula.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/Un4jdNn/red_balloon_toy_store_orleans_ma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469128/normal_5ffe452f39ce3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377656/normal_6000a0dc4868e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419193/normal_5fdb3b06957d7.pdfIn PDF document text
    • http://xojudesabesone.66ghz.com/past_simple_vs_continuous_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385853/normal_600ca9693eccf.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/mhdWijd/bass_pro_shop_san_jose_santa.pdfIn PDF document text
    • https://cdn.sqhk.co/kafevinuva/irYggif/calendar_days_calculator_nz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413851/normal_5fd1e93bd2a74.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/jonora/visual_studio_code_emmet_cheat_sheet.pdfIn PDF document text
    • http://simagofuzod.epizy.com/after_effects_video_templates_free_cs6.pdfIn PDF document text
    • http://fuvezijejek.epizy.com/painting_canvas_hobby_lobby.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/asics_running_shoe_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/free_math_worksheets_3rd_grade_number_patterns.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/3ds_emulator_apk_for_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_off0000de3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3F 5060 bytes
SHA-256: 4290298fd1299a9c3150db8852e4ceb886a5d4096381e4aa966d93b223f62f13
font_01_sfnt_off0000ef68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF68 11184 bytes
SHA-256: ffbda7018647303bbce41bc8ae8d897f3963a495becb55811b442c187345228b

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