Malicious PDF — malware analysis report

Static analysis result for SHA-256 636108e4c8ba308f…

MALICIOUS

PDF

76.6 KB Created: 2021-03-20 20:05:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 267b0ec7cab06868e4cbc71a36d3684d SHA-1: 24b13b37a8f6b1ad930f2cb5bb7383d0b6435d11 SHA-256: 636108e4c8ba308ff6a84de1593536c0e597f5988a331d58ea776b03ad7fc681
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'https://nipisod.ru/aws?utm_term=what+size+is+a+30+inch+waist+in+women%2527s+jeans+us', which is likely a lure to a malicious site. The document body, though partially corrupted, contains text related to clothing sizes, suggesting a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/aws?utm_term=what+size+is+a+30+inch+waist+in+women%2527s+jeans+us
    • https://cdn.sqhk.co/pixafosabow/tIT5xha/mediaf_re_minecraft_mods_bedrock.pdf
    • http://aydym.club/bibibamegunejueg129.pdf
    • http://kexawez.mygamesonline.org/42119478355.pdf
    • http://fitit.space/727958925586g7sk.pdf
    • http://nuwazomesesanok.mygamesonline.org/bulletin_de_salaire_2020.pdf
    • http://teagreen.space/celluloid_closeteorsm.pdf
    • http://lifolibi.sportsontheweb.net/wezavasixe.pdf
    • https://cdn.sqhk.co/remigalakefo/dibliji/prison_break_season_6_download_toxicwap.pdf
    • https://cdn.sqhk.co/xalesikozip/hcrKttD/cosmoprof_login_canada.pdf
    • http://namabal.scienceontheweb.net/fuvorosasudis.pdf
    • https://cdn.sqhk.co/baxafapunubi/gjzialO/47762655392.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/30423916-1054-45ae-a238-2b09b500209c/how_to_work_out_a_rolling_offset.pdf
    • http://perexuwofogefo.onlinewebshop.net/centrifugation_principle_types_and_application.pdf
    • https://uploads.strikinglycdn.com/files/a151f367-d4d9-479a-a0a7-9b82761991f1/with_president_johnsons_reconstruction_plans_the_southern_planters.pdf
    • https://uploads.strikinglycdn.com/files/960e0a9c-407d-4db8-80a7-9ed697830e45/2003_saturn_vue_engine_problems.pdf
    • https://uploads.strikinglycdn.com/files/2287918d-f1f4-4587-b59e-66a57684972a/which_states_had_a_flat_state_income_tax_in_2009.pdf
    • https://uploads.strikinglycdn.com/files/b0955012-6b3e-40e3-aa3b-87674dd0aa87/2002_honda_accord_ex_owners_manual.pdf
    • http://vivetusukuv.onlinewebshop.net/a_wrinkle_in_time_summary.pdf
    • https://uploads.strikinglycdn.com/files/2022f09a-80be-450f-80db-8cd3512fdf88/how_many_questions_are_on_the_cdl_combination_test.pdf
    • https://uploads.strikinglycdn.com/files/21aa23fb-0271-4dd7-9b0c-cb9416be9fdf/stephen_hawking_books_amazon.pdf
    • https://uploads.strikinglycdn.com/files/2f8c9c82-6733-4210-9890-f52e4a6facda/kutuzijasalobawotinu.pdf
    • http://xanedemu.onlinewebshop.net/algorithme_diagonale_d_une_matrice.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecdf.bin
2a41a6c9a1d5528d13890474b28f5321cd68b82828e561f9acaf1d0a4404d4b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECDF 5480 bytes
font_01_sfnt_off0000ff86.bin
ea7304c9b254210db55c4b03404b06f230f5be4a6262bfa60dcc9b0460dd49f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF86 10900 bytes

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