Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0ec6e37d2e5731…

MALICIOUS

PDF

63.0 KB Created: 2020-11-10 11:49:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5549aa6b226e04c6d6a4853b687bb576 SHA-1: 28f7409cc9cb0eff2c64087a8bab6af3796d9e87 SHA-256: ce0ec6e37d2e57315ce57d57abedb5ccd2b1f1e85c327198f594af25f661eeed
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/123?keyword=ishizu+ishtar+costume PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381340/normal_5f98839bc3741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5fa49d7a6dcf0.pdfIn PDF document text
    • https://mokitigek.weebly.com/uploads/1/3/1/6/131606839/7274923.pdfIn PDF document text
    • https://zepinimokibe.weebly.com/uploads/1/3/4/3/134373719/5119248.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446636/normal_5fa602b7bdc69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5faa55556f33e.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/2729169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f9d728273495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382639/normal_5f9d91de55110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f96c41cc0350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443617/normal_5fa2622435f22.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/303b1af0-c802-4cdb-bd54-ef5e50852be2/frost_mage_pve_guide_8.1.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_off0000b9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E3 4992 bytes
SHA-256: eb3678c83129e85b9166c38af31f0758f4c4cf222462927525f34b9a5f51cef0
font_01_sfnt_off0000cabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABD 10816 bytes
SHA-256: e16e85b723bf2d1bf94f6e43223c185a4e9d571a2215b25ef4d5cce6e3625fc9