Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4dfb30b446ecd03…

MALICIOUS

PDF

69.1 KB Created: 2021-01-14 11:09:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 63eb4aad3be49a5934eeceb7346686e6 SHA-1: b691235198b7f0a8370b8ae098b86cf08b346887 SHA-256: f4dfb30b446ecd034f0e2094759eb3e91c57577160cdff94249d3da2068e591a
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site or download further malicious content. ClamAV detection and ML classification strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to exploit users through social engineering, aligning with spearphishing tactics.

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://trafffi.ru/123?utm_term=julio+ramon+ribeyro+cuentos+de+circunstancias PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384639/normal_5fef0d28e4852.pdfIn PDF document text
    • https://cdn.sqhk.co/jalafimimodo/Whb1jdP/95150569421.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459629/normal_5fdca97553e63.pdfIn PDF document text
    • https://site-1182802.mozfiles.com/files/1182802/15298436034.pdfIn PDF document text
    • https://site-1172340.mozfiles.com/files/1172340/lesson_plan_free_fall.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492892/normal_5fe3ee5f53e4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382418/normal_5fb579709c1f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_5f97e8480f791.pdfIn PDF document text
    • https://cdn.sqhk.co/lulaxujik/cWtmhbU/56826734026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387412/normal_5f8e554b6e537.pdfIn PDF document text
    • https://site-1178710.mozfiles.com/files/1178710/highway_driver_jobs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474218/normal_5ffe77ee647a8.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/dazinibonofobi/astral_projection_guided_meditation_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/giwupisulezek.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_off0000cf8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8A 5316 bytes
SHA-256: a2fe19438cad96a7a2ad2a03961eac8ba561331a106a681428898eb6ebe25192
font_01_sfnt_off0000e184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE184 11104 bytes
SHA-256: 1741953184e298f83f86bc08eecba9b0482795e11310aa22e3d87e7b83cc6ed9