Malicious PDF — malware analysis report

Static analysis result for SHA-256 0513325d53fc7280…

MALICIOUS

PDF

85.3 KB Created: 2021-02-19 00:44:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 207649e9d525b3563bdb1ad11f458c69 SHA-1: c6b349ba272f2ca283575a9c648a946494847137 SHA-256: 0513325d53fc7280e8bac04e4aad74200b0b4b3e97a14b60f334c5e11922e43f
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a page related to 'bohemian rhapsody piano sheet music accompaniment', suggesting a lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards the use of embedded JavaScript for malicious actions, likely to download or redirect to a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=bohemian+rhapsody+piano+sheet+music+accompaniment PDF link annotation
    • https://cdn.sqhk.co/litawoxelida/jbBoif8/rojotubewesixawanisitu.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/bZEuiiI/woodshop_classes_online.pdfIn PDF document text
    • https://cdn.sqhk.co/lizuxutagisu/AcIFjie/neurosis_definicion_psicologia.pdfIn PDF document text
    • https://cdn.sqhk.co/xanapaje/4rOhaSq/configuration_hyperspin_android.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/gdMYIjf/35556981687.pdfIn PDF document text
    • https://cdn.sqhk.co/funixatugesi/ibigghR/derwent_innovation_country_coverage.pdfIn PDF document text
    • https://cdn.sqhk.co/rokijatu/jhzQjeM/flight_simulator_pc_game_pass.pdfIn PDF document text
    • https://cdn.sqhk.co/buxotulato/hbRBiji/efootball_pes_2021_mobile_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/8igpUgh/go_fish_mystic_yelp.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/xjhQjil/crazy_chef_fast_restaurant_cooking_game_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/dhbgegh/pandemic_meaning_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/loxepafigav/ijid6ae/microsoft_authenticator_app_on_apple_watch.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/fenatagazise/weekly_planner_template_hourly.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/sec_sustainability_reporting_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/adobe_dc_installer.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/characteristics_of_civilization_worksheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE3 5432 bytes
SHA-256: 79e910da937eb2cd95eaed0e933c27ab4600288ad6bad1e7dc5d6c4298dae05f
font_01_sfnt_off00010d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D34 11108 bytes
SHA-256: 2337fb3e6f4b7306677901bd1bd26bba61733988f169c70a8faa2db1245ec149
font_02_sfnt_off000132c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C9 16100 bytes
SHA-256: 84650fe671c70ac66f3af0994468c9b9feb42d01905b0f030d5781e095ef8e52

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