Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c134cbd3be21633…

MALICIOUS

PDF

72.1 KB Created: 2021-02-11 05:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fc14976411998768713ba537c3bbbd39 SHA-1: 43bce1b0c0301d232003cb33eb8cda5fd0f35270 SHA-256: 6c134cbd3be21633637146cb863854b098f1b212486be87331666bbec6c94ae1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malicious redirection attempt. ClamAV and ML classifiers strongly flagged this file as malicious, specifically as a phishing trojan. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=the+hamilton+collection+phone+number PDF link annotation
    • https://cdn.sqhk.co/sifujubagis/fKhcpQn/84563884871.pdfIn PDF document text
    • https://cdn.sqhk.co/susojareb/G7Ugfig/bedroom_furniture_sets_sale_rooms_to_go.pdfIn PDF document text
    • http://cuzinfo.ru/65306624334x5lwn.pdfIn PDF document text
    • https://cdn.sqhk.co/vurikede/haif4d1/hidden_valley_golf_course_delaware_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/bikolazasir/jhBEm8S/kaserizorubojunad.pdfIn PDF document text
    • http://detonicufficiale.website/excel_master_detail_sheetl2n23.pdfIn PDF document text
    • http://tugrull.com/kekepuliwugedodepuna42q20.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/97Zshgl/corporate_entrepreneurial_mindset_ppt.pdfIn PDF document text
    • http://theporte.xyz/shikshan_sankraman_may_2020_downloadnb3sf.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/space_shuttle_simulator_free_online8qj8c.pdfIn PDF document text
    • http://sekegixederixit.iblogger.org/manual_capsule_filling_machine_suppliers.pdfIn PDF document text
    • https://cdn.sqhk.co/pivatiwon/egejtRi/nimekujaxijakikinaka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dejogamolefip.rf.gd/webcam_test_software_free.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/fax_cover_sheet_template_libreoffice.pdfIn PDF document text
    • http://fiwiduropewoxo.rf.gd/makalah_anoreksia_nervosa.pdfIn PDF document text
    • http://runoxujozu.rf.gd/non_mutually_exclusive_events_worksheet_with_answers.pdfIn PDF document text
    • http://gigivixegaxun.epizy.com/80635466861.pdfIn PDF document text
    • http://jefevuxivux.epizy.com/guzuzo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F1 4964 bytes
SHA-256: 3f9d29f48bc8d4d75476fad41b23d1b6292a3f1c9033726490343f3f36c79073
font_01_sfnt_off0000e3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A3 9676 bytes
SHA-256: 9911fbe7e2b32e56014add520a12b7743d6daa5e87cdd430636e505bc8b08234
font_02_sfnt_off000104ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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