Malicious PDF — malware analysis report

Static analysis result for SHA-256 550adc201dc2d99e…

MALICIOUS

PDF

80.9 KB Created: 2021-03-04 23:29:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9d070cd39c4bf7f7137623d08ff2695d SHA-1: f0db03657045bc934fece50472dc04101d1201c2 SHA-256: 550adc201dc2d99e157ea215e98db8d7c526904420614a6eabe726685d172920
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that redirect to external websites, including one identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/award?keyword=wim+hof+method+app PDF link annotation
    • http://wumewil.sportsontheweb.net/what_proved_einsteins_theory_of_relativity_as_accurate_and_when.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/def3ab7e-d062-425f-9a32-5bc6d8e5a790/speed_queen_washing_machine_installation_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e58bea-612e-49d5-822c-16f897c0143c/why_isnt_my_vizio_sound_bar_connect_to_bluetooth.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/how_to_get_a_list_of_penny_stocks.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/eureka_forbes_vacuum_cleaner_service_centre_trivandrum.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/loluteluni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f2a944-2395-4de4-a37c-5b6f4e1babb1/44054814023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef6c073-5822-467a-98af-449b1a901c14/what_is_spiritual_discernment_got_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/54289421436.pdfIn PDF document text
    • http://ketunetu.rf.gd/bokeh_effect_png_zip_file.pdfIn PDF document text
    • http://manepiri.epizy.com/bulma_vs_bootstrap_performance.pdfIn PDF document text
    • http://xivegujox.epizy.com/what_is_a_timeless_kitchen.pdfIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/craftsman_wet_dry_vac_hose_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867f5152-95dd-43d5-b968-4864252648bb/69626632000.pdfIn PDF document text
    • http://xarugutivi.epizy.com/15563909099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/829473f0-b373-4404-bf3d-c5eb4dc93768/how_does_quantum_theory_satisfactorily_explains_black-body_radiation.pdfIn PDF document text
    • http://sabaramofedofi.rf.gd/the_most_common_mistakes_in_english_usage_by_thomas_elliott_berry.pdfIn PDF document text
    • http://mepusafufeja.rf.gd/junior_project_manager_job_description_template.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_off000101a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A9 4988 bytes
SHA-256: 2875f22af2538cc55ee2c3873e20c4df0eba6a4865f0bfd2754a577239e5e162
font_01_sfnt_off00011290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11290 10520 bytes
SHA-256: 782670abb66fa421b1ea1ea4a7bcebc61d97e89e250fd09f8a7288c6bf598c09

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