Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fb6432d72ebbb4e…

MALICIOUS

PDF

176.2 KB Created: 2021-03-21 11:32:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a51a26fc7f54cec80fbc521bfd86b2a6 SHA-1: 0aec0438f080080e3c4806035dea39471a10c514 SHA-256: 4fb6432d72ebbb4e93d329ad5fc073cd59b5ec067c2a35b883cf6a3a18dcf220
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://zajinet.ru/wix?keyword=trailblazer+elementary+school', which is likely used to deliver a secondary payload or conduct a phishing attack. The document body appears to be corrupted or obfuscated, but the presence of the malicious URL and the strong heuristic firings suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://zajinet.ru/wix?keyword=trailblazer+elementary+school PDF link annotation
    • https://cdn.sqhk.co/vemudumuxixu/eihyofi/duririwagezosawaxodon.pdfIn PDF document text
    • https://xatevixi.weebly.com/uploads/1/3/4/6/134651360/3157591.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/jcuXhaR/music_quiz_questions_90s_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/hjjgcyT/motor_racing_mania_apk_day.pdfIn PDF document text
    • https://xaweregosakub.weebly.com/uploads/1/3/1/4/131407668/7637116.pdfIn PDF document text
    • https://cdn.sqhk.co/kavatupopum/8gdhhia/forensic_audit_procedures.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/gfhjChg/modabesutemafakesederuleg.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/gotijejaj/army_ocp_uniform_regulations_socks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d049c8-5b8f-4874-8943-e6a31ff89a85/rumawumawetod.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/2740595062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36e70eb2-7c3f-4a1f-9733-d9819276d3ac/pioneer_sw-8mk2_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/rofodufulekire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d60850-f9a6-49b8-a7c2-1fdcd2f4727d/development_through_the_lifespan_6th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c2f9036-474a-4db8-91f0-b808395b78e1/225636855.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/mandatory_minimum_sentences_reform.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/algebra_2_simplifying_radicals_imaginary_numbers_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e5d95d-81ef-4f54-8aad-eef827511b7b/69677828365.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/modern_flow_cytometry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8102a66d-e9ca-4a5c-8758-a29c58ed13af/zitizomejudovuwofefan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d15f4b2-fee7-4601-962e-b4ad4b1885d4/80949351196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d283cc-9fd3-4c79-a579-59e52a65d8a7/a_series_of_unfortunate_events_movie_cast_then_and_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da6ad063-cfb4-4b10-b71e-47f7e237973d/analog_circuit_design_textbook.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_off00027bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27BD9 5280 bytes
SHA-256: 57bf1a169ea9c6a9f878537a434d011a243e533fbdba66a3e527f5593019a693
font_01_sfnt_off00028da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28DA8 11116 bytes
SHA-256: 53c8b7628f6cb378279c702900f698ae8b05733d800747c1ca2bbf710c9d0b85

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