Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63ca869633b0e0e…

MALICIOUS

PDF

70.4 KB Created: 2021-02-23 14:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d2811a599ca2574271920c769d113809 SHA-1: 30f9361be2f4b320181ebd52679d5045d949079b SHA-256: c63ca869633b0e0ecd694fe0b205ecf3a7fdafbf241190e6fc2c18e8e30b6171
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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://baarspo.ru/strik?utm_term=blender+2.80+2d+animation+tutorial PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481402/normal_601a9d8a1e32b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415974/normal_60256353271c3.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/9hj9iey/i_know_worship_song_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477181/normal_5ff140bf6bf95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426701/normal_6007dc503c291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427086/normal_6023e40ca12c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500882/normal_6025137a6bf72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486201/normal_5fd2f43e55304.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/ehgiaOr/mopabavonuderenupegija.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/wgc3gcB/bowling_score_sheet_sample.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/nerugiraxura/gubezenu.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/what_are_the_3_estates_of_france.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/cmc_rescue_guide_app.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/music_audio_editor_cutter_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/new_york_prentice_hall_chemistry_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/guide_du_routard_israel_jerusalem.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_off0000d6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BD 5340 bytes
SHA-256: 2a203370da1c7ed3301b5f54eb6ec014e48231bf297f8a5b86f1b5fa74e17f42
font_01_sfnt_off0000e8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CF 10472 bytes
SHA-256: a7db3e1fa12e7052b50b75000749c5a8a4d36b383096beb2a44d35f8eaeb0b7d

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