Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b1f4b042ee013ff…

MALICIOUS

PDF

74.5 KB Created: 2021-05-09 06:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 771c138408bc8c6488b5db8292a8602f SHA-1: dcae69d180434a2ce905dbc14aaec26ca2eff128 SHA-256: 5b1f4b042ee013ff9a383906041e7462dd56deeb42b4e0ea5bb1beb397cdbd87
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL `https://seumenha.ru/strik?utm_term=thinkpad+t430+weight` suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards a common phishing lure to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://seumenha.ru/strik?utm_term=thinkpad+t430+weight
    • http://goldenframecollision.com/medieval_2_total_war_scotland_unit_idqbw1k.pdf
    • https://cdn.sqhk.co/rabataxuvax/bkhcQuz/nails_for_you_prices_erin_mills.pdf
    • http://lusuwivaw.medianewsonline.com/31629791364.pdf
    • http://lady-bug.club/99855227774ot62a.pdf
    • http://akillidestekbasvuruformu.online/algebra_and_trigonometry_with_analytic_geometry_13th_edition_answers2svyc.pdf
    • https://cdn.sqhk.co/wexunaveb/gZ2Dhgx/bagobiwopijivesite.pdf
    • https://cdn.sqhk.co/ligazupevu/5ejjdYo/20573413921.pdf
    • http://dommasters.site/what_is_a_tree_trunk_anatomyznc9w.pdf
    • http://organicnu.info/sowepuwuxilomusolobaviza31i.pdf
    • http://lnstagramverifiedsbadgeform.com/estomatitis_aftosa_niosxy82z.pdf
    • http://creditreportusa.info/wonadiwigebht22j.pdf
    • http://hurricane1.space/ontological_coachingpytrk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/97b7d2fe-292b-4096-85bf-5be8d4d8c930/20363776421.pdf
    • http://siwemoxoxawevuv.atwebpages.com/livro_gnosticismo.pdf
    • https://uploads.strikinglycdn.com/files/fb803243-f63c-420a-8f5c-122a90ea09b2/the_magic_of_believing_vic_johnson.pdf
    • https://uploads.strikinglycdn.com/files/859e4c13-06ca-4e99-baa8-ca8d0ab0aa40/rancilio_silvia_service_perth.pdf
    • https://uploads.strikinglycdn.com/files/9cf144e3-2654-4820-b576-b8386a954249/vissani_refrigerator_stopped_working.pdf
    • https://uploads.strikinglycdn.com/files/e53d62d4-c609-4b56-8949-5a07fa59a825/25014470306.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ce.bin
8ff0864f07a485c50451e5567b32b214879fbd130f9b83ff5013c7f329e6dcf6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CE 5416 bytes
font_01_sfnt_off0000f658.bin
b7c018d872388d16f620b05d0d43d6b9fa7a48eb202942dfb0e6b08e9ee9780d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF658 11416 bytes