Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f4cf84235be402…

MALICIOUS

PDF

72.1 KB Created: 2021-04-30 10:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6ba1887a6b042c6c1122d3647878eaa8 SHA-1: 74cbe1bae43b5769c70e8120a15d76cff0ff9802 SHA-256: c0f4cf84235be4024f750b4c760f74fa68c2e5402badc891045a534d708ab601
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document body, though partially corrupted, contains a URL that appears to be a lure for phishing or malware delivery. The presence of embedded URLs and the overall detection suggest the file is designed to trick users into navigating to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=how+to+put+sbg6580+in+bridge+mode PDF link annotation
    • http://instas.site/papilas_fungiformes_circunvaladas_filiformes_e_foliceasvblci.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481831/normal_601d8dc217c75.pdfIn PDF document text
    • http://raliwoze.iblogger.org/kennedy_center_honors_led_zeppelin_heart_performance.pdfIn PDF document text
    • http://afracheat3.xyz/35839948503vdywe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412757/normal_606694d57ff28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485689/normal_606d9e164411d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389805/normal_600fcba4851aa.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/funniest_kid_test_answers_part_131xnid.pdfIn PDF document text
    • http://copyright-supporthelp.com/68259941180dm0ld.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451737/normal_606e6fd1d098e.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/metubevozisul/coway_ap-1512hh_instructions.pdfIn PDF document text
    • http://vatezajis.rf.gd/fokek.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/sample_monthly_accomplishment_report_for_teachers.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/12414817710.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/astrology_books_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0abf3877-e79e-4f8c-96e0-ab8a398ce079/mopufifavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81715407-9e20-47d8-82c7-f340d119ad8e/89556166170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/893391df-46ee-466f-8862-0e0afc9e8808/kovagive.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/breast_screening_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/bronchiolitis_treatment_guidelines_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/ejercicios_de_comprension_lectora_para_2_grado_de_primaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/315228c3-e69a-4743-99e6-7f3d6c7e8ad4/types_of_job_titles_in_retail.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_off0000dbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCA 5844 bytes
SHA-256: 60e74c246e7e34eff7dd6f6fcd9f8737e28fcc2dcc986f165b295e3d0d832db3
font_01_sfnt_off0000efa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA5 10568 bytes
SHA-256: 9f4e2ecc3af237e0f8d3e8800c54ec60f975647d033a63db7a51c1f2d89b6355

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