Malicious PDF — malware analysis report

Static analysis result for SHA-256 18710cf59b1b5d93…

MALICIOUS

PDF

74.9 KB Created: 2021-07-17 12:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7bcb8696e4d68284be6ffc66ba767242 SHA-1: 49dcf11d0def2c23650f7a01f7bf3da10747465a SHA-256: 18710cf59b1b5d9304612a23b0a27f1fafc5951cdac08aa132754d6918d91352
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan activity. An external URI was found embedded in the PDF metadata, suggesting an attempt to redirect the user to a malicious site. Although the document body is heavily obfuscated and unreadable, the presence of the embedded URI and the ClamAV detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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://feedproxy.google.com/~r/sq/ugae/~3/r_nBws6J8g8/square?utm_term=likee+downloader+mp4
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec87054c0b954f9ea47a18/1626113797262/sle_treatment_in_ayurveda.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed8cac9db072196a23c75c/1626180780824/23076831971.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c423.bin
c958405452cf46d0ee61695bd19c41bb4febdbcafbca588955edce58d1c6a014		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC423 10500 bytes
font_01_sfnt_off0000dc00.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC00 16792 bytes
font_02_sfnt_off0000f412.bin
3b008da2e906f1bf5a6f73d1ff4b52ed53300887e5d18533d77777c1252f9df2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF412 17024 bytes

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