Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9adac565e6f6a6…

MALICIOUS

PDF

86.8 KB Created: 2021-02-14 12:57:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 50a704eb2b4fe802191a664dec34a271 SHA-1: 309b070d5e9581ef74d8f8d70e6bfd8d6754f316 SHA-256: cf9adac565e6f6a654682d1bdc44ab48e6e9a83e6a6c927ccb2d73017b52510f
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as a phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially obfuscated, suggests a lure related to educational content to direct the user to the malicious URL.

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://bologen.ru/wix?keyword=graphing+systems+of+nonlinear+inequalities+worksheet PDF link annotation
    • http://dunewewibi.22web.org/lepefisurunitabu.pdfIn PDF document text
    • http://boxidodo.22web.org/maven_surefire_plugin_html_report.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/ijbtjhX/bunny_pop_game_download_for_pc.pdfIn PDF document text
    • http://pexiwaz.iblogger.org/jotun_solvalitt_data_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/pefatipi/UQWdgjd/kabutidewigiwofifagifo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fazegixedibuw.rf.gd/sheridan_cotton_sateen_sheets_review.pdfIn PDF document text
    • http://nalakakowim.epizy.com/vanebamonugilemopu.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/magazine_template_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/implant_surgical_guide_planning.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/nisilovog.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/gusafake.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/new_zealand_earthquake_news_report.pdfIn PDF document text
    • http://fefezaw.rf.gd/c10ph_zener_diode_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/zerev.pdfIn PDF document text
    • http://tagugatukosag.epizy.com/web_designing_course_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/89452537260.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/zebizajefikidav.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/inventory_is_classified_on_balance_sheet.pdfIn PDF document text
    • http://bikukasosisado.epizy.com/free_bearshare_music_s.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB39 5612 bytes
SHA-256: e3b9fec0b50d365552cc79bf3ade68d85b4f878094c4f8d065b9a3f2cea4fcaf
font_01_sfnt_off00010e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E44 15172 bytes
SHA-256: da04d258f663a970b770c572d4c97aaabf6bdf0b5d6383ccd11f0156e0161c7b
font_02_sfnt_off00013d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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