Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ac86e4cc7bf2b5…

MALICIOUS

PDF

77.9 KB Created: 2021-01-28 13:06:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e951465b3af62ae8b29a6b402e7ac53b SHA-1: c6452a7197079f70a6e4891815c0dae91fe7edaf SHA-256: 90ac86e4cc7bf2b50907706e778e8faca866d3c444f6ac22efa1b8f6477619e5
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'leonvi.ru', which is likely part of a phishing or credential harvesting scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure the user to a malicious site.

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://leonvi.ru/123?utm_term=laplace+transform+of+t%255E2+sinat PDF link annotation
    • https://cdn.sqhk.co/jukelifawap/jehhhNg/professional_interior_house_painters_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/5gjIMih/princess_dress_up_and_makeover_games_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/dezosanag/figeSGK/bike_race_today_route.pdfIn PDF document text
    • https://cdn.sqhk.co/bimepefav/eheBjjG/44359082197.pdfIn PDF document text
    • http://juilopkiretlo.ru/dopuxalomitisudejojego8pzj8.pdfIn PDF document text
    • http://1xbet-registrat.site/fapewivefd9mio.pdfIn PDF document text
    • http://limons.space/68174876791vmsp5.pdfIn PDF document text
    • https://cdn.sqhk.co/zivunegas/hgxhahh/16310733601.pdfIn PDF document text
    • https://cdn.sqhk.co/biposuba/gdBQ9ji/lirisuvomikaxajirijevumid.pdfIn PDF document text
    • https://cdn.sqhk.co/ratobomebal/rCzgdQq/premier_league_top_scorers_2020_21_season.pdfIn PDF document text
    • http://reliables.ru/storm_corrosion_drag_ropes_letrahy1p2.pdfIn PDF document text
    • https://cdn.sqhk.co/kutogudofi/ieiqYhV/22857479249.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/eifgf9L/wurevopiditeda.pdfIn PDF document text
    • https://cdn.sqhk.co/fixijolexap/hxhgjbA/lizunixajajiketovij.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/aRr81E1/stick_bow_mastery.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/iVWicSW/rujifawefujewedimig.pdfIn PDF document text
    • https://cdn.sqhk.co/zujagepax/Jihhgdu/vazakuluxojego.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/zarusegibitumet/correct_the_spelling_mistakes_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/postman_6._7._4.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/barnaba_song_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/zixirofonarefok.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_off0000d8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E6 5284 bytes
SHA-256: 71636770345c22e834d6241520ca35d66e30a31d1ee98fa35134c436acaab600
font_01_sfnt_off0000ead8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD8 13200 bytes
SHA-256: 6ce9c9fbf96037daf1c87c5062a9d42bb7e1720e28e2ebdd8f48755fe4d83c9c
font_02_sfnt_off00011568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11568 16080 bytes
SHA-256: aba6d7228e0fcc42341ee09250d9598a413f48202077e5963e65f524ed209447

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