Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5dc27ba6ac39c7…

MALICIOUS

PDF

91.0 KB Created: 2021-03-01 02:05:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 6f2fa3b3375d1ee8e0985805c0eaf3ef SHA-1: 0028c37d06b100ddb6cf972d97f17d1535c446f4 SHA-256: 4a5dc27ba6ac39c7cb1c40c51901bdc421e79a984b331dec61839718a370b3d1
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, 'xezojetit.ru', which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, appears to reference a song title, suggesting a social engineering lure.

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://xezojetit.ru/strik?utm_term=comptine+d%2527un+autre+ete+translation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370269/normal_602d0831c044b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sazomo/uber_defensive_driving_course_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/lean_on_me_sheet_music_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/medians_and_altitudes_of_triangles_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/bolujisuzukuluwugarawu.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/79596410782.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/vadixozukubudujaseve.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/cursos_de_ingles_em_orlando_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/dariserop.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/acer_aspire_laptop_wont_turn_on_or_charge.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/identifying_adjective_and_adverb_prepositional_phrases.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/14659053190.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/gixotazo.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/zedoje.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/boss_movie_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/eagles_injury_report_twitter.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/39960889472.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5F 4296 bytes
SHA-256: 9a6b18854c3420464194bce294d3505f449197479df73e4b95f1baa97ecdb86c
font_01_sfnt_off00010e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E68 5044 bytes
SHA-256: 172b4d8fba81a0141f7908d45e620763212bb48db0ced24cd5b0b3316627e617
font_02_sfnt_off00011f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F75 12796 bytes
SHA-256: 3598147836dba71748dfe8d8425dcdbb0ae107a3a59ccd83dbbf7d6ba43389c8
font_03_sfnt_off00014797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14797 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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