Malicious PDF — malware analysis report

Static analysis result for SHA-256 90821b3ac82f671d…

MALICIOUS

PDF

66.0 KB Created: 2020-11-11 06:34:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 0cf04c25d77f4fab34fe68621f3f9c27 SHA-1: d293416dccf51912712cab032ea425bb6698bdc9 SHA-256: 90821b3ac82f671d05ae45c6f2d347ab103c0ee4a9403f40cf61c6d4709737b8
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/strik?keyword=pokemon+sun+and+moon+full+episodes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5fa6b6776b561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389353/normal_5fab67c1bafb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454047/normal_5fa5b1666dd37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f9a4a5ce06f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422373/normal_5f992a8a2e77a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375093/normal_5fa06954e166f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5faa55e98b78b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401694/normal_5fa4c4404c3b0.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/nademopor/bath_high_school_mi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7550d822-9651-42a7-aec7-f82b229c47d8/kodid.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_off0000c650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC650 5156 bytes
SHA-256: 336c19548fcff697e7dec713b71573b8500839806bff038a5f03dab12fd03855
font_01_sfnt_off0000d7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D9 10500 bytes
SHA-256: 2be58dd1559d86388437bdf49021fd468a4886431f4530a75bae9301cb790e58