Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c807bb207ab1ac…

MALICIOUS

PDF

57.7 KB Created: 2020-12-23 12:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8470682080ba84070d95e475f8fa14e8 SHA-1: e6207b1e2bf4090409a960c245a17e7f4240a2ce SHA-256: b6c807bb207ab1ac4b9e709dbae7ea4ccea04d61b67c04d3eba5c0c1c6d4a235
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL pointing to 'traffset.ru/strik', likely intended to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit the user's trust through a deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=top+hits+fm+radio PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478383/normal_5fbc7902da303.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402246/normal_5fdd126c41949.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/kitike.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414331/normal_5fc5bb26d97c5.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/paropabaru/xulizumevir.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/84198178845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d798dee-4409-4db2-be55-34860c7654e9/zaxifotoxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72634962-2274-4989-bbd3-17e1da957151/watch_free_movies_online_wolf_of_wall_street.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_off0000a76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA76B 5200 bytes
SHA-256: 8e9bb42bb2407e91035fadaef5cb2ad3d4ee7e6e2355e2e1d0169c90d457c45a
font_01_sfnt_off0000b8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8ED 9992 bytes
SHA-256: 6601a02b649fe958cc8d56366dc2b09c19b572e20f2254a7979a43a9d1932083

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