Malicious PDF — malware analysis report

Static analysis result for SHA-256 c279822dbe93b703…

MALICIOUS

PDF

72.4 KB Created: 2021-02-22 18:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 99ea64e1d7a98011e55ab19f93ccf99c SHA-1: 64b13300ed3e2b42b869e7dbb27e7aaafed88e6b SHA-256: c279822dbe93b7030449c791cde901957fad568b035b465bdcc9b6f647917d31
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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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=how+to+train+your+dragon+book+reading+order PDF link annotation
    • http://wiinorama.space/fajupowuzolewelozcrop.pdfIn PDF document text
    • http://vodoroding.info/1396893010wh7j7.pdfIn PDF document text
    • http://letnesil.xyz/baahubali_1_tamil_movies_hdrcsmm.pdfIn PDF document text
    • http://ig-supportcenter.xyz/10917671822tv65d.pdfIn PDF document text
    • http://lavka-karamel.ru/hungry_snake_java_gamemztny.pdfIn PDF document text
    • http://easy-money-cash.space/android_fragment_attach_listenerb6z24.pdfIn PDF document text
    • http://teagreen.space/libros_quimica_general_gratisy99un.pdfIn PDF document text
    • https://vubeluzuge.weebly.com/uploads/1/3/4/3/134357782/pobozitijozedajane.pdfIn PDF document text
    • http://ezfix.asia/54977248992pbewv.pdfIn PDF document text
    • https://cdn.sqhk.co/zajujinul/gjdgf2L/zombie_running_phone_app_android.pdfIn PDF document text
    • http://italdom.fun/introduction_to_statistics_and_data_analysis_5th_edition_answersf4ekf.pdfIn PDF document text
    • http://itfamily.pro/how_to_prepare_for_an_aged_care_interviewx6u76.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/2W3qhg8/red_ball_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/ihjaFmo/aquapark_io_20mod_20apk.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/fuvidokibet/1848448901.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_off0000dfec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEC 5144 bytes
SHA-256: bd5f86128f3eda084e91121e70335db4bc0b30392863577deb5c5d0621c93df8
font_01_sfnt_off0000f18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 10240 bytes
SHA-256: d6ca34249dfdcb82c8cc24a9fb4f3a6d85ca1faba3ec7bbd1b89eb376de00b56