Malicious PDF — malware analysis report

Static analysis result for SHA-256 925821f4fb54f0cf…

MALICIOUS

PDF

90.8 KB Created: 2020-12-05 16:06:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 726316343c775e34189b0fdba2ff9e37 SHA-1: c272f2210d44a5a0c24052e76906b9952e6f548a SHA-256: 925821f4fb54f0cf39f4ab7392bdcb480ec23b9103891171de87ea99f51581da
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 0.9995

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
  • 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://trafffi.ru/123?utm_term=undertale+genocide+ending+black+screen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414682/normal_5fa06cb82b87c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416494/normal_5fc2c743950a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387411/normal_5fb95a7cb7b4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f887e1205795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412151/normal_5f93fd615213f.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/tosego/corelogic_credco_on_my_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/72048364802.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc013b624b06a7eb3fa8a9b/t/5fc3fb96e18c5c478e76fbe2/1606679448896/noxaniviseze.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe41b04e98326c02dc2d7f/1606304177489/63936260048.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/52492749405.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_off00012624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12624 5300 bytes
SHA-256: 4b7aa944e7128c770fdc70bf232a07bb93de488297c5ca4d41b504e02126045a
font_01_sfnt_off0001383b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383B 11304 bytes
SHA-256: 887fe0033f99887178c9cb838787c1f5dbee0cb4a6997c38e8e597efdb7b0456