Malicious PDF — malware analysis report

Static analysis result for SHA-256 d063752eb48ffddb…

MALICIOUS

PDF

79.7 KB Created: 2021-02-07 15:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8c5684fb0ceee108a059f0305f5c3eba SHA-1: e7f20290e02400743e99e73b0e36b8e907555b2c SHA-256: d063752eb48ffddb35773ea24af13a7b9b5349848f77d9d91835ae98297d8a53
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'leonvi.ru', which is likely used to redirect users to a phishing or malware-hosting site. The presence of PDF-specific heuristics and embedded URLs suggests an attempt to exploit users through a malicious document, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=gm+power+chord+guitar PDF link annotation
    • https://cdn.sqhk.co/befozaxulot/hexDBeb/business_visa_tourism_china.pdfIn PDF document text
    • https://cdn.sqhk.co/navififoro/3dqRhdW/31002201792.pdfIn PDF document text
    • http://sexedate69.site/microprocessor_and_assembly_language_programming_ebooksgfc9.pdfIn PDF document text
    • https://cdn.sqhk.co/lajoroteb/ciiLhfh/euro_truck_simulator_2_radios_argentinas.pdfIn PDF document text
    • https://cdn.sqhk.co/muvenetu/7ieVij9/gadelositoxetitig.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/EhbUiaj/america_east_women_s_basketball_tournament_2020.pdfIn PDF document text
    • http://unosital.space/lenovo_yoga_730_camera_not_working5lsrg.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/ichj2hj/furniture_design_software_free_download_full_version.pdfIn PDF document text
    • http://activa-fb.com/wurikekk6bf.pdfIn PDF document text
    • https://cdn.sqhk.co/zogameva/lidgfig/nhl_standings_playoffs_2020_results.pdfIn PDF document text
    • https://cdn.sqhk.co/vimanagadu/SOn5jcc/47245406297.pdfIn PDF document text
    • https://cdn.sqhk.co/kesokirow/YEX4D0q/82437896536.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/qpjfLjb/playstation_app_download_games_to_ps4.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/perurulexi/43952176336.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/sotazur.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/beat_synonym_formal.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/70131268698.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/bewubajadivavogedagezi.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/online_tax_invoice_template_australia.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2F 5400 bytes
SHA-256: 1c213eb4e5096bbb25e8226099252272d6929c232952d984a1417eb59c3f6bdf
font_01_sfnt_off0000ee76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE76 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000f703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF703 10868 bytes
SHA-256: 97a98178f9b1012652551a7e554e8fe43e003bd92f75d08db0b2313545b083af
font_03_sfnt_off00011c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C30 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d

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