Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebeae9e84cc97783…

MALICIOUS

PDF

104.5 KB Created: 2021-03-20 21:17:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 76809086fab5efed21bf4214bdbed502 SHA-1: f277a532da5a288ded7e0be7aed61c602a8df642 SHA-256: ebeae9e84cc977833bec21f9f1d6c23478dd045a381edd43079059b97a7b2bbe
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, 'leonvi.ru', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=surya+bhai+ka+film PDF link annotation
    • http://pisazujinatef.iblogger.org/canon_in_d_major_guitar_tab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485296/normal_602396accccf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_5fd1bffd3f008.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385197/normal_5fff3d9f9fb9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370269/normal_6044a54753cf8.pdfIn PDF document text
    • http://sufevar.22web.org/gosorutegisixamizetemod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426957/normal_5fc8792f89dc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xelilurezo.epizy.com/whatsapp_plus_new_version_free.pdfIn PDF document text
    • http://pizubape.rf.gd/types_of_rapid_diagnostic_test_for_malaria.pdfIn PDF document text
    • http://xisajegaxije.epizy.com/23640811179.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/tixavorotufalamimebul.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/crochet_afghan_patterns_for_beginners_video.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/jukapajefosaxek.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/free_sheet_music_flute_cello_piano.pdfIn PDF document text
    • http://kubitilabevovup.rf.gd/upsc_assistant_commandant_previous_year_question_papers.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/avenza_maps_for_windows_7.pdfIn PDF document text
    • http://dalitixusukewo.epizy.com/beresheet_hotel_deals.pdfIn PDF document text
    • http://neduweleviwov.rf.gd/panesogineb.pdfIn PDF document text
    • http://lirovixak.rf.gd/13198325088.pdfIn PDF document text
    • http://kasegame.rf.gd/interjection_sentences_worksheets.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_off000147b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147B8 5236 bytes
SHA-256: f3b659a4db9450668662147897505c80d1edcae58f675ebcc37abfd05b8ab90e
font_01_sfnt_off0001596c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1596C 10940 bytes
SHA-256: 8acbb807232b4eb2c5b0aaade67e64543b36e96197c6425d2293ce4b798a3f43
font_02_sfnt_off00017f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F29 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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