Malicious PDF — malware analysis report

Static analysis result for SHA-256 363e23d5da37324e…

MALICIOUS

PDF

71.6 KB Created: 2021-06-05 18:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 53b517f9665cfd64f43411748557a4a8 SHA-1: 40ff98b7ec9e230fd9e9562f4cef751c71875fb2 SHA-256: 363e23d5da37324e3cfa97bcd779944966d4eed4a76a6b969fb19f2f618a2d64
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'medvor.ru', which is likely part of the phishing infrastructure. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to lure the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://medvor.ru/pbw?utm_term=bajrangbali+full+hd+3d+wallpaper PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jabodawo.pbworks.com/w/file/fetch/144601308/37458784093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/025d0860-068c-4d49-9217-84d4d0aabcb0/sap_users_by_complex_selection_criteria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bbc3ac9-d97e-4bbb-8f1e-fcd351232623/9919435695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ccf0018-f978-4e0c-843d-a74a1e58cd18/52062996843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36692e53-e2ab-44cc-b017-bd3899f6a20a/principles_of_geotechnical_engineering_8th_edition_solution_manual_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c281dd7-fd97-4cbd-acfd-1e957e916407/medios_de_comunicacin_que_utilizamos_actualmente.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27dd3930-7f3f-41c1-9fd6-19da1bb6422a/mumobegaloporatupewarom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d56bdfb3-0790-4499-ba61-cdf4d0afddfe/what_does_gimp_mean_uk.pdfIn PDF document text
    • http://xetibubib.pbworks.com/w/file/fetch/144418056/zotetuxomozabonim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf41c7c3-959d-40ae-af11-504fbf364f59/fedloan_forgiveness_20_years.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f475d858-7ded-4568-adcb-79e3d06b96ff/xuvuke.pdfIn PDF document text
    • http://sozakuvepar.pbworks.com/f/russell_hobbs_hand_mixer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa320588-ebe6-4398-8335-69e8d01d34eb/50409322959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/139f68a8-04ae-498b-8d84-5684d6d5197c/fagor_pressure_cooker_lid_seal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2479c82-93bc-49bb-9c89-8f0c992f5159/tuguxizezosibiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f4829f-cd68-45c0-949c-a223a0647534/zedodopaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b5e39c9-2049-44ee-af73-e1a394270b8d/sinibefelujuvimam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bfbe9c5-cd0b-42f5-bc15-348432bb2858/los_hermanos_karamazov_libro_de_dostoievski.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12acd088-5b40-46f0-9972-ec6c3b9339e4/the_odyssey_book_9_discussion_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe9d182-be60-46f1-ac19-76c06767ed2f/simupevumekufaxuridudi.pdfIn PDF document text
    • http://tagexoba.pbworks.com/f/devipefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88289121-d8c8-4b09-9b94-77b5b1a97589/35329407808.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fef0943a-b496-44e7-94a4-6589d48bcfe6/73403970827.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_off0000dc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC68 5648 bytes
SHA-256: 35263b0ffcf14789dabb7dc094cbb14eebff1113a4bc77e3e47363c6bc925c3f
font_01_sfnt_off0000efae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAE 9724 bytes
SHA-256: a1c9ab26d69dd7165d02786c69a5b67cf281445705f5febfa56123d329e6189a

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