Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f2f28b990080fa…

MALICIOUS

PDF

86.6 KB Created: 2021-02-06 15:58:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5fda86b52939ab0cdc64a735b450214f SHA-1: c3b0c4425915991145a024a25d9dcc544db7b08e SHA-256: 09f2f28b990080fa357f0b027865cbdb0556cae3e0e2a0466df1800505d7d178
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that mimics a search result for 'dental hygiene worksheets pdf', suggesting a phishing or social engineering lure. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the detection suggest the document is designed to redirect users to malicious content, likely for credential harvesting or malware delivery.

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://seumenha.ru/wb?keyword=dental%20hygiene%20worksheets%20pdf PDF link annotation
    • http://ezfix.asia/pluto_the_evolutionary_journey_of_the_soulalcqq.pdfIn PDF document text
    • http://handler-autoscout24.com/967293547210sulu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408584/normal_5feb8905cead6.pdfIn PDF document text
    • http://stassikorskyi.com/zagasivajedigomilijsr2wt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422894/normal_5fef77176b77c.pdfIn PDF document text
    • http://ibkreactiva2020.com/mijadipitenozawocarp6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403141/normal_5fe5a546a21a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492573/normal_5ff70a642e9cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481286/normal_5fed28da43eb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489595/normal_5fe41240633c1.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/ihh4dhh/nidabawoxatedojuwe.pdfIn PDF document text
    • http://helpcopyright-service.com/the_archer_warrior_apkam0aw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5fe7a2c2198d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374542/normal_600a175e5ef93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5fd3977264df0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369914/normal_60027bfed16e4.pdfIn PDF document text
    • http://cuzinfo.ru/dutufogobajabiviwusl0lk4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428045/normal_5fec01ce8f375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477369/normal_5fe83a6a9f876.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000113f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F8 5560 bytes
SHA-256: 8bffef890ff25ebf3f971dd604a6f6fe6b0351d5d0f5b6ac7a0e0a2a0e84146e
font_01_sfnt_off00012709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12709 11196 bytes
SHA-256: eed9989b7c01f1a1b8bcb7a517e66efe236bf28a4edb1a9fc3e9669c9737e35a

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