Malicious PDF — malware analysis report

Static analysis result for SHA-256 5462d726fc502c0f…

MALICIOUS

PDF

97.0 KB Created: 2021-03-29 19:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c01a464dead6c3419a756b6cf589f3e1 SHA-1: 5068d7d14d4388270665865ef150b0f821b9df56 SHA-256: 5462d726fc502c0f362f4fc280919490cc1fa0aaab8700416aad282cd395c3d4
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or domains associated with phishing. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically flags the sample as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme.

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://xezojetit.ru/award?keyword=simple+present+affirmative+form+pdf PDF link annotation
    • https://cdn.sqhk.co/guwuweri/giNM3ic/free_download_game_farm_heroes_saga_for_laptop.pdfIn PDF document text
    • http://firstsecu-paypal.com/frostpunk_refugees_scenario_guide2g0o6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_60310f640250a.pdfIn PDF document text
    • http://wunawuwome.22web.org/english_grammar_exercises_book_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_6011d68399f8f.pdfIn PDF document text
    • http://kalidejomepajo.scienceontheweb.net/97105297145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446761/normal_604974095079b.pdfIn PDF document text
    • http://latuha.com/87081153255ncn95.pdfIn PDF document text
    • http://bigomipami.22web.org/dozakavuzopiparapase.pdfIn PDF document text
    • http://xipelosowux.22web.org/the_case_for_a_creator_by_lee_strobel.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/bjgiihh/calculator_apps_download_for_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/5cKhjib/kuwumajosogozafoze.pdfIn PDF document text
    • http://ejqy.com/how_much_do_homicide_detectives_get_paid_an_hour4008u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sisufovofow.atwebpages.com/najukoj.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/halloween_activities_for_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/520a4469-2e5b-4935-bfc0-30229487d1e2/why_was_waking_the_dead_cancelled.pdfIn PDF document text
    • http://napajex.epizy.com/list_of_inspirational_quotes_for_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a9887c-18d1-4f42-9bd8-cf5ff60f8f98/what_is_scaffolding_and_zone_of_proximal_development.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12498 5348 bytes
SHA-256: 715fe13a0a9a8ef88278e043733f4809369d1bf305b8c659e7b26c0ee9b29ee4
font_01_sfnt_off000136b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B1 13184 bytes
SHA-256: 1497d15e243de383537859dbf9d293b799fa9cf8c4d413900ef3646cc220a3b6
font_02_sfnt_off00015fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FBE 16096 bytes
SHA-256: 3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca

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