Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce19879696251711…

MALICIOUS

PDF

66.1 KB Created: 2021-03-03 11:21:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e34b8d7ac01ae14a0ac166e0e3719711 SHA-1: 5fe36166765fcf359f0db105d2bae208f1eee8de SHA-256: ce19879696251711af8ed69f2c5784a54b52e421e29d8bd7814dec3946a0dbd7
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'zajinet.ru', which is highly suspicious and flagged by heuristics as an external URI and part of a phishing/malicious detection. The ML classifier and ClamAV also strongly indicate maliciousness. The document body, though heavily obfuscated, contains text related to downloading a PDF, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/award?keyword=complications+a+surgeon%2527s+notes+on+an+imperfect+science+pdf+download PDF link annotation
    • http://puxexawug.iblogger.org/biology_past_papers_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463010/normal_6038202383497.pdfIn PDF document text
    • http://kadabafomelu.66ghz.com/samsung_note_10_stock_wallpaper.pdfIn PDF document text
    • http://monubaz.iblogger.org/business_plan_template_app_startup.pdfIn PDF document text
    • http://ladidoxa.iblogger.org/building_plan_application_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452382/normal_5ffc54f300374.pdfIn PDF document text
    • http://modalidetefid.iblogger.org/acer_aspire_one_722_battery_removal.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/jotogorurekuro/guidelines_laid_down_traduction.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/jumble_puzzle_answers_for_august_30_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/atlas_copco_ga_75_air_compressor_service_manual.pdfIn PDF document text
    • http://mufifofoge.epizy.com/fowosenozekemoxipajaged.pdfIn PDF document text
    • http://luzigipo.epizy.com/raj_bhai_all_video_song.pdfIn PDF document text
    • http://kasisexa.rf.gd/bisowevenotemak.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/manual_radio_citroen_c3_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/karen_page_reporter.pdfIn PDF document text
    • http://memugeb.rf.gd/pakufadunesumilowiv.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC598 5504 bytes
SHA-256: 46f1e14f862f2024f3d229682994a64b17e9b4181e6ae695770c806b233aa136
font_01_sfnt_off0000d84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84C 10104 bytes
SHA-256: c5fea1de97741580d6d1fa4d05bf044d6554c60a0f6bf93d62a899420a84d662

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