Malicious PDF — malware analysis report

Static analysis result for SHA-256 4424963e8f26b86b…

MALICIOUS

PDF

79.6 KB Created: 2020-12-25 06:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: dd6aa211e192d7ad6f9af821d607f3c6 SHA-1: 09850c4222b8c797e86c4aa474845cf0cc2fbc2c SHA-256: 4424963e8f26b86bbb9a01eb845d03f735afad0a93cf8c31b690289f27a3fd89
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to 'traffset.ru', which is likely used for phishing or to download a secondary payload. The document body is heavily obfuscated, but the presence of the external URI and the overall detection indicate a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/aws?utm_term=wot+kv+4+guide+deutsch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481539/normal_5fd7ebd743236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450355/normal_5fc13f69bb9ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5fbdfa7bed150.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458125/normal_5fcc546ed286d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468814/normal_5fc331f54d8be.pdfIn PDF document text
    • https://cdn.sqhk.co/soredepel/fhajcig/62095563014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f8e83c45f845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423427/normal_5fc32646d998b.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwibagula/gcgeifx/midavesukeginakofagalis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_5f9772f57d303.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/jjahaeN/crossing_jordan_cast_where_are_they_now.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/162e11dc-14f8-4a41-9f3c-d58bde928093/ralajolisokej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2172c22-e0e8-498a-b01f-64ad89628dac/how_to_reset_a_google_home_mini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df8935e0-1138-451d-a484-f3fd0a6f2c6c/sunanutuzukibiwumupuva.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_off0000fb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB92 5088 bytes
SHA-256: 751f27eeb52e28e2650eae9ce2bd708c6d87bfa3bd1185425641888c6b684166
font_01_sfnt_off00010d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D08 10744 bytes
SHA-256: 8d2077fb40f5506f4927ce221fb20330fe147ab18691c1857b0d79952e9fe60b