Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f4a90dfbbdbc93e…

MALICIOUS

PDF

62.3 KB Created: 2020-11-25 06:21:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c55425a719c1adf3c587b9d6aac51750 SHA-1: 1756cf595b48b13cb0185eeacfc0517ddff9e43f SHA-256: 8f4a90dfbbdbc93e44ad78432b76839aaffaefe8abd4254e2111b810077b8ff4
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/strik?utm_term=cabinet+door+spice+rack+walmart PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f8b2f7136545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419198/normal_5f9fd6001f664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5f973734a32dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f8e8971b5732.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9359e1c5-8165-4d51-af37-4c3f71da9917/bobovamirosanum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ef88702-702d-41ea-958a-385a4c03248f/dizi_indirme_sitesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16473355-d801-4d5f-b4f6-a98fc3c7c846/68668213783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/157f019e-fb91-45dc-ab40-b55523ac54cc/29591288345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7731417e-3b38-4912-91e7-aa23d520d967/6696181173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35330ff0-5801-46bf-aff9-af6bb7a45c28/lixujam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24e764e3-6716-46fa-92e3-c07afc248395/tetulewimokumosozenul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/864652a9-8f99-4d69-bda0-177eec8d211e/zawimixajetareb.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_off0000b980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB980 5420 bytes
SHA-256: 136b3007d44c26b9aa85d7313dcfe146a1cadfcf9a3bdd7098cc31392c1365f5
font_01_sfnt_off0000cbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE4 9588 bytes
SHA-256: 44607db605a6397f71fcfa32552ad3e5f5e224c333e528e97f4557e1c3bbd9db