Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c222da9e46e6f0…

MALICIOUS

PDF

78.9 KB Created: 2021-04-06 14:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 05c17c6de2b614d09bcdf07e0ca48c5b SHA-1: 5ce6c27481248845d8ccddf37ab69e01b4b9cbe0 SHA-256: 30c222da9e46e6f089a4dfc5c769e493df8a48a0590fb1022836a89d258cfac2
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of many external URIs suggests an attempt to redirect the user to malicious content, likely disguised as legitimate information such as sports fixtures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://ponafet.ru/award?keyword=absa+premier+league+fixtures+2020+20+pdf PDF link annotation
    • http://dekopubetalukaz.22web.org/85889087297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480736/normal_605247b58378f.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/wijekexoj.pdfIn PDF document text
    • http://wugegifa.getenjoyment.net/airway_pressure_release_ventilation_theory_and_practice.pdfIn PDF document text
    • https://cdn.sqhk.co/pudamunipum/vhgoQja/grade_12_english_study_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_601d5c5174650.pdfIn PDF document text
    • http://favodokoleti.mypressonline.com/79639567464.pdfIn PDF document text
    • http://sanadewa.iblogger.org/lake_chelan_weather_report.pdfIn PDF document text
    • https://cdn.sqhk.co/xosuridasago/anHMa5k/glow_hockey_app.pdfIn PDF document text
    • http://tajopujamelupa.22web.org/xovulexijumepededoja.pdfIn PDF document text
    • http://ponemofetu.scienceontheweb.net/blockchain_technology_seminar_report.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://sajomapujozokux.onlinewebshop.net/zasara.pdfIn PDF document text
    • http://widurema.epizy.com/anole_care_sheet.pdfIn PDF document text
    • http://fixenositate.rf.gd/critical_thinking_questions_for_interview.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/24_hour_clock_conversion_table.pdfIn PDF document text
    • http://bamonoxo.onlinewebshop.net/libro_de_fisica_3_secundaria.pdfIn PDF document text
    • http://zegudonokor.epizy.com/latest_ios_for_iphone_6s.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/wudede.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/kenep.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE826 5500 bytes
SHA-256: 31d2a95e031d8057dd0760009c96059dfa7e142bf141c13c2ba89a797478c700
font_01_sfnt_off0000fadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADB 10832 bytes
SHA-256: 57b51a1ee35e4597130c2a451c59bdf1961d72fb50cc6f710156fc8e063e6bc7
font_02_sfnt_off00011fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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