Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4ba6f5491610f4b…

MALICIOUS

PDF

79.7 KB Created: 2020-12-21 09:03:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bebe0e59dbe8645de75c0d7d820d66e3 SHA-1: e55405048344d34da9062e0c035a53f2cc0993a8 SHA-256: b4ba6f5491610f4b1c894410eb1f0d167314b7104309c8264f31c5c7841c58a3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL pointing to a suspicious domain, identified by heuristics as potentially malicious and part of a phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a harmful site disguised as a game link. No scripts were extracted, but the presence of the external URI and the overall classification suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/strik?utm_term=dead+city+game+play+online PDF link annotation
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/da3d914ebe6a1e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f8f4e832dd6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481058/normal_5fbf50a1e2d2d.pdfIn PDF document text
    • https://lujalidulosegex.weebly.com/uploads/1/3/4/3/134369289/160232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_5f9d4385de6b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501770/normal_5fde6ebf4d865.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/9fb90c37-b535-48ae-880c-f1d94410a05b/what_county_is_loveland_ohio_in.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/877197d8-23ca-468f-b13f-296134dc23ce/40325929880.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/gobimakazase.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_off0000fcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD4 5220 bytes
SHA-256: 4b8c537dcbabac93bbbad21a9a264c00d3286cfed28cc9e938e8be87a6bd27de
font_01_sfnt_off00010e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9C 10436 bytes
SHA-256: 073ae6de462963e1d63bf3a59a967652bc90276c01bdc8aea62d389884dc65de

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