Malicious PDF — malware analysis report

Static analysis result for SHA-256 c843e890de62d622…

MALICIOUS

PDF

75.6 KB Created: 2021-06-01 17:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ea5cd5ae7b2cd06bcb89681e96c79715 SHA-1: 97d37a787fce399dd281d41b87aa54fa7a569f83 SHA-256: c843e890de62d622ccc584b6e99eaceab4f26df2f626860723f4d6dbaf76fcee
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The embedded URLs, particularly 'https://drafthe.ru/pbw?utm_term=ovid+metamorphoses+book+12+translation', suggest a phishing or malware distribution attempt. The PDF structure and the presence of numerous links indicate it functions as a link farm designed to redirect users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://drafthe.ru/pbw?utm_term=ovid+metamorphoses+book+12+translation PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xalanupuzewo.pbworks.com/w/file/fetch/144423183/67756179230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/067c0abc-fd6e-413f-93e0-d6bea6dddfd2/watch_kung_fu_panda_2_full_movie_youtube.pdfIn PDF document text
    • http://gudikijuruf.pbworks.com/w/file/fetch/144449358/59308238757.pdfIn PDF document text
    • http://wufamazajo.pbworks.com/f/diviser_un_nombre_entier_par_10_100_ou_1000_exercices.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/f/factors_affecting_weather_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e43f3e1-a9cb-40ef-a7c2-10daa9c280b7/napasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8aa6664-5ce3-44dc-940d-0a6cf83e0c52/lizosof.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/perfumes_the_a-z_guide_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b03838e-a517-418d-993d-a11fad78de37/mavuwigomonabumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3753aab2-e6d6-436c-b65d-233867913215/55270316601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd056d19-b26a-42d5-ab91-dad2ad62b624/54085588591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb0f34b3-d7f6-4670-ab13-d2d2956347d7/93202552625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e53b193-8107-4e0f-b835-664cb8c838c7/15800853078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/596e792f-318f-4fc0-aedb-f8424e784947/petunalezaxaj.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/w/file/fetch/144424149/ejemplos_de_evaluacion_diagnostica_individual_en_preescolar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8370142b-53dc-4f8c-82a9-4bc81339ebea/366975138.pdfIn PDF document text
    • http://biwonuv.pbworks.com/f/how_much_does_a_johnson_25_hp_weight.pdfIn PDF document text
    • http://zexowisam.pbworks.com/w/file/fetch/144426711/3_branches_of_government_4th_grade_lesson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401d03f5-e595-4c47-a550-557bb89a0b7a/javaputudajenokugebujuzez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1c3335f-5914-4b99-9124-9762a2cc6b98/how_does_the_ability_to_interpret_the_constitution_called.pdfIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144454332/10860907393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c1fd0ac-d99d-4c63-bec7-883615f20296/what_is_the_salary_of_sailor_in_indian_navy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4570abb3-5272-4dde-9f51-26e189948aeb/contabilidad_de_costos_para_q_sirve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf855d48-29b4-4cf2-8ed5-b73283dbd8bb/what_is_management_consulting_salary.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_off0000ea47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA47 5672 bytes
SHA-256: fb1be450319b8ba3ba48df914fbe83a05f6d76851e3c072b67e678f713b9bdb4
font_01_sfnt_off0000fd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 10492 bytes
SHA-256: 36a9a2b45196e683bbaf774d6313f657840d68d837ddcf44a1b340c40de261b2

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