Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c6167ee8de719bd…

MALICIOUS

PDF

68.4 KB Created: 2020-11-25 06:04:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1f89bc04f48146c413e426d2d80814f6 SHA-1: 9c1a0372d3d5afdb1e7cef15b7ef7924d373da44 SHA-256: 0c6167ee8de719bdb7586613d690b875dad5ec61bff523cf2c992badbdf7d317
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 0.9998

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
  • 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://cctraff.ru/strik?utm_term=cualitativa+y+cuantitativa+diferencia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_5f951e3db7b93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_5fa7c6b5f18f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_5fa8a7ff201f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5f8df9966f621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f870241327da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483604/normal_5fa851d034632.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/tutapaxi/gupiposevatakajominiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29526e3e-ae7c-44db-b4c8-33bda898ecab/33053518937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea1cc06e-12f0-491d-bb6a-69d6e30f7e18/jufoxujilawaguwaxevukij.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/kisigefesir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2782719d-9b6c-4b6a-a3ce-32ce481156c7/22211496908.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_off0000cd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9E 4904 bytes
SHA-256: cdd72e92ac5977f8e9ab24c6ab29132fedb75fa15d3822b059a662fae76e4eba
font_01_sfnt_off0000de65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE65 11540 bytes
SHA-256: cca415327c254773361fceee98516e3f4a54b474200213860104e6ccbf0f1798