Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b4160b4c63288c…

MALICIOUS

PDF

74.5 KB Created: 2021-05-18 17:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e18f8837ef184b62c417ac46036d5ff4 SHA-1: a9273f6b380da8bc9a8543e068c2607eae0996a7 SHA-256: d6b4160b4c63288c107747b178a8a9ed33e0a0ce09fbdcfd6ffa95c188b20efd
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, masquerading as a budget proposal. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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://golowaki.ru/strik?utm_term=how+to+write+a+budget+proposal+for+an+event PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/86298b9b-3145-4999-a1a6-7b747f5b1922/64653219698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2686f783-0cec-4782-85ec-c2218e36373e/selena_quintanilla_pelicula_don_juan_demarco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20debcd9-4782-4242-a944-559a6e3e28af/lista_de_verbos_irregulares_en_ingles_con_pronunciacion_y_significado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438400dc-f9ea-4e00-9cad-83cb6c014918/57821777517.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/2315773866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dde46bb-f4ba-4c2e-aa9d-794bcad94410/how_to_play_blackjack_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b2e1a2-b1a0-4807-a529-c1b064219e55/65041552841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83bd3c0d-72dc-4c72-a4da-5cc8f8cc07b9/31391836090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/139fbd2f-1bfe-46ad-ac0d-14f3be1cf553/12204449069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f7b1bb7-f186-461d-9db5-9a174e24f3a8/86925938242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/548253be-b8fa-4fbe-a999-cb0da347933a/35015876354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6bdf3af-074d-4fdb-aff9-fba923910bcf/how_many_quarts_of_oil_does_a_22kw_generac_generator_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c316c4bd-03d4-418e-b084-ac3244b4936c/92183239211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e5ed68-85e9-4d66-960d-f4bb4f29597c/cartesian_coordinate_system.pdfIn PDF document text
    • http://vavazewesepato.epizy.com/mudegatililogorune.pdfIn PDF document text
    • http://litopuputorer.rf.gd/free_vpn_android_china_server.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/551ebb50-1bf7-483e-b538-f2bcb3837249/loridepefemejuwenav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b9737c-077d-4be2-bc10-a0efe67147de/waterpik_cordless_advanced_water_flosser_wp-562_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/lagaxovowavosagelo.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_off0000e5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D0 5460 bytes
SHA-256: ea69f8893d4de98599843b2fbd243fa1f3d6660cb968a19a8517713b5615ec9e
font_01_sfnt_off0000f884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF884 10512 bytes
SHA-256: 934eb8aef8b6d0a1e6c086dae65344536873a1c059d8974c77e51ec3e5374435

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