Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd5c05c7c40e441…

MALICIOUS

PDF

81.9 KB Created: 2021-04-14 16:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: be2bf2f6dbbfd726b374251fd7f86c29 SHA-1: a90ca38f4f3a7af7cbf50bb36d8af4163d457f59 SHA-256: 2fd5c05c7c40e4411211e7a93cb35c35f039271cbc1d9e832e8391794ab999d0
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious and likely phishing-related. It contains numerous embedded URLs, with notable ones pointing to disposable hosting and potentially malicious domains like 'resalured.ru'. The PDF's structure and the presence of external URIs suggest it's designed to redirect users to harmful sites, possibly for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=how+to+define+religion+sociology PDF link annotation
    • http://vvd.bar/32866162278r4e1q.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/jgjiJQJ/3410655424.pdfIn PDF document text
    • http://it50life.pro/leadership_skills_in_nursing_journal_articlesy7ksv.pdfIn PDF document text
    • http://newsportstechnology.ru/rutaluwogirerm6sty.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/hcVSJSL/92465717865.pdfIn PDF document text
    • http://copyrighthelpcentral.com/nabijep6lah0.pdfIn PDF document text
    • http://xagowawusik.66ghz.com/rapid_typing_4._6._1.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/fjbgdja/all_about_small_business_administration_definition.pdfIn PDF document text
    • http://homebig.space/why_does_my_hp_laser_printer_print_blank_pages3fwm4.pdfIn PDF document text
    • http://miwodenexiz.iblogger.org/gosport_war_memorial_hospital_report_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/14feae61-a138-4821-82cd-4ca90a0ec4be/jobumix.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/6.0_powerstroke_intake_manifold_bolts_torque_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/19237293120.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/slayer_codex_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd52aab5-2eba-4909-89f9-d7a71c8b3f52/directv_h25_receiver_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fce2f4-f976-4e69-ae21-5f0009ee95a6/planificacion_estrategica_de_una_empresa_agricola.pdfIn PDF document text
    • http://novuzebires.rf.gd/how_to_find_position_based_on_velocity_time_graph.pdfIn PDF document text
    • http://petegidon.rf.gd/growth_track_manual_church_of_the_highlands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddc10f97-0183-4cd1-bac6-b3057c1e59bc/xeniwiputowidagon.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/74818002317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b0b0ae8-1267-40fc-95a4-083364e5381c/dunululo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2eab1d0-82ea-497a-8b04-29989bcb5353/boc_study_guide_histotechnology_2nd_edition.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_off0001036b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036B 5132 bytes
SHA-256: d8b346c82d62e39bb2c0981e27a1be300db865c4e01da9f5821cd344a4af577e
font_01_sfnt_off00011510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11510 10920 bytes
SHA-256: 7f9030eec4e0151d4caa748ef374042e25f46d82ce91eba864869b35b73dc4f5