Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5115ac316e1f44…

MALICIOUS

PDF

70.8 KB Created: 2021-05-11 16:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4be40dc86808eedba7cd84c3b6fb90b SHA-1: 1ae6ec82efac26ec72d26c12a2a8181b830c4a7f SHA-256: 9a5115ac316e1f44020db076713e8c2ed6069dbefda772cc2c044c0d3bb19e91
94 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of external URIs, specifically 'https://jacksth.ru/strik?utm_term=amar+chitra+katha+books+pdf', suggests the document is designed to redirect users to potentially harmful content or download further malware. The document body, though heavily corrupted, contains metadata related to PDF generation, reinforcing its nature as a potentially deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7298

Heuristics 3

  • 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
  • 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://jacksth.ru/strik?utm_term=amar+chitra+katha+books+pdf
    • http://uscreditinquiry.info/86760784047aeepj.pdf
    • http://kepogosibasenip.iblogger.org/70527251014.pdf
    • https://cdn-cms.f-static.net/uploads/4447885/normal_6031139e94815.pdf
    • http://kutakelipaxeb.22web.org/business_dashboard_templates_powerpoint.pdf
    • http://leqqurint.online/76077979366jevio.pdf
    • http://art-practice.org/nomigesmmqi0.pdf
    • http://toolsbestpricemicrometer.site/lovez04lks.pdf
    • https://cdn-cms.f-static.net/uploads/4467277/normal_6029d5916db38.pdf
    • http://vertitribe.store/5886443683gk8p8.pdf
    • http://nunanokipikade.22web.org/battle_cats_crazed_cow_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sezusin.rf.gd/project_risk_management_books.pdf
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_4e312dddbf6945f1aa982e89ba16ccc5.pdf?index=true
    • https://2521c3e2-5736-45bb-9381-71005f2ffa37.filesusr.com/ugd/c85705_0b3338e603f845bf832352d9bfeaab3b.pdf?index=true
    • http://mimosoxokilufaf.epizy.com/xakidazoleg.pdf
    • https://s3.amazonaws.com/dafumuxitupav/how_to_be_smart_in_mind.pdf
    • https://s3.amazonaws.com/tuzamada/google_chrome_android_bookmark_bar.pdf
    • https://s3.amazonaws.com/nuvukivaxiren/naxinukuzuxisigiwizu.pdf
    • https://s3.amazonaws.com/dujepav/93099213636.pdf
    • https://s3.amazonaws.com/xoferuzu/crochet_patterns_for_bernat_super_bulky_yarn.pdf
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_a3d3c9ae6d8f482f83953a0a16f91418.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc3.bin
e287220ff9079fda8934334a99ab0ed2380e5561184efb14119827a0df29e353		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC3 5556 bytes
font_01_sfnt_off0000f06e.bin
6436214169b01c95aa4e7afad8a6a3267c933459c02c19a7dfb487bc885f5cd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF06E 4152 bytes

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