Malicious PDF — malware analysis report

Static analysis result for SHA-256 895d1275c9a8da3c…

MALICIOUS

PDF

126.1 KB Created: 2021-03-11 05:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3175cbd85eec8c43c26d0641bf61a252 SHA-1: 9b921131e6f932cc90de4255b2282157d075f636 SHA-256: 895d1275c9a8da3cae0ac183830f8fefa4d8d0e30c044b5e6a3b10e070cfb897
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. The primary indicator is an embedded URI pointing to 'soxebez.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=mycobacterium+bovis+infection+in+animals+and+humans+pdf
    • https://cdn.sqhk.co/gotuxixovumu/YhiVghf/nakoxopivoforoji.pdf
    • https://cdn.sqhk.co/ramowejub/Piigjgi/royal_farms_near_me_hours.pdf
    • https://cdn.sqhk.co/fowipovoji/Yhhgh39/49219473511.pdf
    • https://cdn.sqhk.co/xusovatovu/jihfY6G/umc_hospital_emergency_room_phone_number.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/132cf9ea-270c-4980-97a3-42be626515da/50061718759.pdf
    • https://s3.amazonaws.com/mefovu/job_reference_sheet_example.pdf
    • https://s3.amazonaws.com/batiku/financial_reporting_tools_list.pdf
    • https://uploads.strikinglycdn.com/files/d1282e35-8ba8-4fb6-88da-a37be0fe3e83/timex_1440_sports_watch_instructions.pdf
    • https://uploads.strikinglycdn.com/files/8bfc3f48-8868-486c-a9e0-904144b94c1b/how_to_put_shredder_on_cuisinart_food_processor.pdf
    • https://s3.amazonaws.com/sugowubuf/human_body_systems_worksheet_doc.pdf
    • https://uploads.strikinglycdn.com/files/2a73ea5a-cea6-4bac-ad9e-065b8deb658a/listado_de_verbos_en_ingles_en_presente_simple.pdf
    • https://s3.amazonaws.com/nuselufuzo/gnu_gcc_c_compiler.pdf
    • https://s3.amazonaws.com/xovajukoxin/answer_to_divorce_complaint_pennsylvania.pdf
    • https://s3.amazonaws.com/wavunot/fms_flying_model_simulator.pdf
    • https://s3.amazonaws.com/pirofopafu/katotejidilomogojavifu.pdf
    • https://s3.amazonaws.com/dufekifaral/math_problem_solving_worksheets_6th_grade.pdf
    • https://s3.amazonaws.com/nojemi/blackfly_apk_old_version.pdf
    • https://uploads.strikinglycdn.com/files/724e14db-e1a0-4c7c-b56c-b784b20c94d1/73255489514.pdf
    • https://s3.amazonaws.com/legapatatezisa/44608372494.pdf
    • https://uploads.strikinglycdn.com/files/284007e6-c5bc-4924-b895-6279967ffcec/4042686795.pdf
    • https://s3.amazonaws.com/fusopoxipo/brother_cs6000i_sewing_machine_parts.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_off0001aeb7.bin
4f102b9a37b2c75c296f323c6c595ce9fcbf67ea071aec4f2b01e57ea4229c89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEB7 5700 bytes
font_01_sfnt_off0001c20f.bin
19e35edf4965e46407b89ebd9507b8168aeba850e49db1700b4adf887e10a046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C20F 12528 bytes

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