Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e6cca3a99dc0d5…

MALICIOUS

PDF

71.5 KB Created: 2021-01-02 02:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ead3d03b157263a5c0d1627a7723b656 SHA-1: e7d5dda3f312d736e99ecc12c1b7ba82310a5045 SHA-256: 59e6cca3a99dc0d531703bb5e2e4f45545b094e92fe88dfa3f835a65a6c69675
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded URI pointing to 'trafffe.ru', a known malicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI are sufficient indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://trafffe.ru/123?utm_term=adjectives+for+the+sunny PDF link annotation
    • https://cdn.sqhk.co/relulapezele/gffIzhg/28887810883.pdfIn PDF document text
    • https://cdn.sqhk.co/vunelebu/D7digoX/xoneko.pdfIn PDF document text
    • https://cdn.sqhk.co/gisusisabez/ldgfhgE/26571459928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403129/normal_5fb9ed5ab0094.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/palevijuj/rate_expression_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/que_son_los_canales_de_distribucion.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/honda_cb175_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/13499386736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4d9f671-a63c-4212-98d3-251652672f1c/95196332605.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_off0000d8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A8 5092 bytes
SHA-256: 32b8e137539390947ff3d5d8ab28e38fa28cbe3f336b883e63f8d1cdd9583e45
font_01_sfnt_off0000ea0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0F 11116 bytes
SHA-256: ef2e8108cff94bb84eb2c1d6dcf7c04a4668ea7043df792cd5e1609e198d703a

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