Malicious PDF — malware analysis report

Static analysis result for SHA-256 6107f1f148eb6454…

MALICIOUS

PDF

74.9 KB Created: 2021-02-18 17:07:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cd58b6ebadaa1bc9da16c9c0b250510f SHA-1: d7eef23f4c517db9a9ecb707ec58aa1f2bdf5a29 SHA-256: 6107f1f148eb645489ba8edd87130d21c78a17fbf650988f85c54ffe4bd24be2
104 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is often used to redirect users to malicious websites or exploit vulnerabilities. The presence of external URIs, including one flagged as potentially malicious, further supports a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/strik?utm_term=2009+hyundai+sonata+maintenance+guide PDF link annotation
    • https://cdn.sqhk.co/gefeloxo/TidjayL/ahlamalik_williams_y_madonna.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/7iaZjbG/classroom_management_lesson_plan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421624/normal_5ffca4b08fff5.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/eniigjh/wekanem.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/2NROYgi/niwajuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495976/normal_5fca732531b6f.pdfIn PDF document text
    • https://cdn.sqhk.co/gugapedulob/hyqgjhi/nowaterofore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490757/normal_6014d3ec5e151.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486763/normal_5feb3309cb3b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molezadidusoser.rf.gd/identifying_types_of_fractions_worksheets.pdfIn PDF document text
    • http://kibomurabinide.epizy.com/android_10_samsung_galaxy_s10_plus_beta.pdfIn PDF document text
    • http://fikexole.rf.gd/franchising_code_of_conduct_inquiry_report.pdfIn PDF document text
    • http://mugevewobota.rf.gd/matefe.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_off0000e770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE770 5664 bytes
SHA-256: ada47e282abe56884b03cecbe850d06160c196cebd4e3c3bf3af5403909e7a9e
font_01_sfnt_off0000fa94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA94 10612 bytes
SHA-256: 98c2e3d2dabebae992435fadc754a772236203586c673847ba91de1a0143c289