Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb3b9b7038814956…

MALICIOUS

PDF

71.3 KB Created: 2021-05-08 07:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: bbda5ad4c42309fe03668f4dc8b6a4e0 SHA-1: 2bedba822496d5d81830371fd5c2e657bdeafdd9 SHA-256: eb3b9b70388149561b6b970ab760db52bb245c9bf01fd9c0a32609b459ba67c3
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to '3rd grade writing workbook pdf', suggesting a social engineering lure.

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://nipisod.ru/strik?utm_term=3rd+grade+writing+workbook+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409819/normal_5fd2dd54c8e09.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/eicvhfY/descargar_dancing_road_color_ball_run_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zixagiko/gvggiRe/magic_mend_scotch_tape.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/giibTgh/cover_letter_for_finance_job.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464852/normal_6014be00dcc08.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/eM47hdz/latest_flower_nail_art_designs_step_by_step.pdfIn PDF document text
    • https://cdn.sqhk.co/kitatoze/XrIgcic/whatsapp_auto_reply_bot_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zuboxizip/egeAgO4/90252506646.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/Pps8gdW/how_to_draw_army_man_easy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381318/normal_5fcfb7e6553b1.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiderubota/ijgejcC/run_dat_back_turbo_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/iqgfshh/87953686279.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/ddziaid/goal_line_blitz_2_builds.pdfIn PDF document text
    • https://cdn.sqhk.co/mokopizel/gchagjh/fuwuvuronejefasoda.pdfIn PDF document text
    • https://cdn.sqhk.co/dutedape/iPGYieG/93103323671.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_60423498b2af7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485015/normal_5ffae8f2dab71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415544/normal_5ffeb9b9ca18a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/badlapur_film_songs_ming.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/customer_service_job_description_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/bewubizezivezukalezowasi.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/turn_metal_bed_frame_into_platform.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC32 5152 bytes
SHA-256: 117a6d71e53329a32989ed345effa015bd2bf458f50dae0153bf129ff1cf66b0
font_01_sfnt_off0000ddd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD0 10424 bytes
SHA-256: ea7f9f0f559904997c9514c5c4573d45a2bfffaceb37af12776376f49abfd4cc
font_02_sfnt_off00010187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10187 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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