Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d297f3853f9938f…

MALICIOUS

PDF

79.9 KB Created: 2020-12-30 08:35:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 86d1126db1da64123e7a1fb5910b0086 SHA-1: 9f11ccf1ff2e3fd1db278b745c3df8e13cc8103e SHA-256: 3d297f3853f9938fcfd82e69e8520b0232fbeed34ee21cad57a61314acd98bdd
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'Presonus tubepre user manual' and the authoring application 'wkhtmltopdf', suggesting a lure. A critical heuristic identified an external URI pointing to 'https://traffnew.ru/123?utm_term=presonus+tubepre+user+manual', which is likely the primary payload delivery mechanism.

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://traffnew.ru/123?utm_term=presonus+tubepre+user+manual PDF link annotation
    • https://vatewiwep.weebly.com/uploads/1/3/4/4/134482367/9fb147e6705.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/jUiigcU/nigomunubew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448100/normal_5fa16c623f6ae.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/giegevM/92189905859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456128/normal_5fb83eca876e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450141/normal_5fa10ae148932.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/04edb2ce-f554-475d-8b33-9f29eb0731f8/atoms_molecules_and_ions_worksheet_for_grade_8.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/92401643537.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/advocateship_mcq_model_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e8de4e-9509-4e02-a056-ba6900aa6cdd/6979932492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5244db46-44ca-4ef6-98d4-fe98bc84e422/xonuxogifepipuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f8c647-8096-46fa-9504-ed0e379c388b/tuzapumavonaselevipe.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_off0000fc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8F 5104 bytes
SHA-256: cde69d0340265b276a8aee1d887b525199668dc0ffa94f5715854981df486598
font_01_sfnt_off00010dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCA 10940 bytes
SHA-256: e9230f6d9670c129d37978a35924bd8ac3bb5f180d644228a6be43a79e6ee22e