Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a91e2936407c9c…

MALICIOUS

PDF

91.6 KB Created: 2021-03-03 12:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ccee9228265600cd2d5e76cf5a065828 SHA-1: fc237565449936a5b9e988666dd129158736b1cf SHA-256: e0a91e2936407c9ce84eb9a9d46362c4f45bf519cb5d324a706388c10c13e694
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'baarspo.ru', which is highly suspicious and likely part of a phishing or malware distribution scheme. ClamAV detection and ML classification further support its malicious nature. The document body, though heavily obfuscated, contains text related to a book title, suggesting a lure to download a specific PDF.

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://baarspo.ru/wix?keyword=your+brain+at+work+david+rock+pdf PDF link annotation
    • http://baykamif.space/dowelalufofxdvf7.pdfIn PDF document text
    • http://kexolifowuj.medianewsonline.com/victoria_secret_pink_phone_number_customer_service.pdfIn PDF document text
    • http://shoop-fh.ru/rhythm_exercises_for_beginners58bgt.pdfIn PDF document text
    • http://mogimetekojubar.scienceontheweb.net/statistical_rethinking_julia.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/naxizugenabi/42779758896.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/fudesipametilazojotavef.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/30665902663.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/edit_text_osx.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/slope_intercept_form_given_2_points_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/quantum_physics_for_dummies_review.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/critical_appraisal_of_quantitative_research_example_essay_using_casp.pdfIn PDF document text
    • http://maligufaribez.epizy.com/cv_template_uk_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/nejebolol.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/cronograma_de_atividades_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/31010406513.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/cancer_detection_program_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/20832688132.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_off00012b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B75 5256 bytes
SHA-256: 4baad8909bf3764bc47bac4f920257564cb98440383899e456b0155624772514
font_01_sfnt_off00013d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D81 10436 bytes
SHA-256: 12dd80db25030776afc353252b94454758fb213eb264f2e5404d7b98e71bfe24

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