Malicious PDF — malware analysis report

Static analysis result for SHA-256 98dd268cfe9ee868…

MALICIOUS

PDF

68.5 KB Created: 2021-02-18 05:14:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3a2581e7738957012b86f24ca557a971 SHA-1: 7001d6d4735ac60b1fb4b210aef8c278531ed1da SHA-256: 98dd268cfe9ee868d944dca5526bb6761b9557fa2dfdc437a9a19942836a3e3a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. An external URI pointing to 'leonvi.ru' was extracted, suggesting the document is used to redirect users to a potentially malicious site. The document body contains garbled text, but the presence of the URL and the detection names strongly suggest a phishing or malware distribution attempt.

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://leonvi.ru/aws?utm_term=cashflow+quadrant+summary+by+chapter PDF link annotation
    • https://cdn.sqhk.co/mogizufofuj/TghjheJ/30358881097.pdfIn PDF document text
    • https://cdn.sqhk.co/jedelamodafa/igHifhh/viserezikazute.pdfIn PDF document text
    • https://cdn.sqhk.co/memenewo/wmuifjg/paruxilasarusuvali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409246/normal_600a5137a3b25.pdfIn PDF document text
    • https://cdn.sqhk.co/fafegatoko/bjbjjii/37180996239.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/ghfgdpe/27852508307.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372373/normal_60059041bfffb.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/RFdp0ge/30172912148.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373240/normal_5fde27b587426.pdfIn PDF document text
    • https://cdn.sqhk.co/rorefevobo/3jd8Eij/offline_maps_navigation_app_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422877/normal_5fe5a04539419.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/subopukomanaw/10082924516.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/nelson_grade_11_biology_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/l_t_annual_report_2016-_17.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/rurijebav.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/7_eleven_malaysia_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/balustrade_design_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/alvar_songs_free_starmusiq.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/66790335955.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/hair_cutting_pictures_image.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/20939960739.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/posepobejeretalujani.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_off0000cf45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF45 5760 bytes
SHA-256: 12fbbb3b1f3c710588869a88ff76a8a6827dbadb118a97d0c628b96efafdb2e2
font_01_sfnt_off0000e2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C7 9760 bytes
SHA-256: fa8d756bc51e56a8d0b599ab9ee4418875cdf941ba86a8916260d818418fed1d

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