Malicious PDF — malware analysis report

Static analysis result for SHA-256 575354ded919ed63…

MALICIOUS

PDF

71.9 KB Created: 2021-02-21 18:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bc9cf6eccbe8763df9d16e723299f027 SHA-1: 26f2fc180b368ebca71ae2928a1f9070808aef31 SHA-256: 575354ded919ed63033d2ceea8cdd065acf24377cf49b46e2ccd615cfe064300
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://bologen.ru/aws?utm_term=ti-nspire+cx+ii+buy', which is likely the primary lure. The document body, though heavily obfuscated, appears to contain text related to 'Ti-nspire cx ii buy', suggesting a product-related lure.

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://bologen.ru/aws?utm_term=ti-nspire+cx+ii+buy PDF link annotation
    • http://reborasiruv.iblogger.org/329553465.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460944/normal_5fe5748229909.pdfIn PDF document text
    • http://nanewak.iblogger.org/washington_state_patrol_accident_report_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496389/normal_6029acdd111ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zekubegem.epizy.com/autodesk_autocad_civil_3d_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/your_brain_at_work_em_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/90125055449.pdfIn PDF document text
    • http://welolazudadiv.epizy.com/10531006901.pdfIn PDF document text
    • http://nemebikox.epizy.com/classic_wow_troll_priest_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/amazon_quiz_contest_today_answer_win_50000.pdfIn PDF document text
    • http://judowasejalux.rf.gd/space_movies_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/reading_comprehension_b1_british_council.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/tewevasuxabikolelit.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/21209916747.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_off0000c63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63E 4976 bytes
SHA-256: 21ae09c821c2494f6c1ae3b85dfc32c1ada7c108ea7b4b111689f1754c807aab
font_01_sfnt_off0000d750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD750 11184 bytes
SHA-256: e5a960f945537de5a943e88b06d5d1c8ddea92351f928dcd5785a72e34fe372a
font_02_sfnt_off0000fd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3A 16140 bytes
SHA-256: 00468df452218f546d59995a7cf9b4297092e2fd476dbd2f6ce79846bd051107

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