Malicious PDF — malware analysis report

Static analysis result for SHA-256 559720699ab1d45b…

MALICIOUS

PDF

80.5 KB Created: 2021-07-17 11:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a98b90eedd43d0f1de011e1b3e2a5f24 SHA-1: b6283fbe7744c3458e1aa0a79d23a72592edbb9e SHA-256: 559720699ab1d45bfea8a4a3cb3907032a5d02ee28caa86ba801989508e79416
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. The presence of embedded URLs, although some are marked as benign, suggests an attempt to redirect the user to malicious content. The wkhtmltopdf authoring application indicates the PDF was likely generated programmatically, potentially to obscure malicious content or facilitate phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6221

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=pie+chart+and+table+ielts
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee6e342a4cda176260f9ca/1626238516237/minodidobopedunaxitetalow.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f09dba479d8c5b0be7636d/1626381754578/67146429492.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec9b2377250868136eef07/1626118947279/5844443573.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_off0000da0c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0C 16792 bytes
font_01_sfnt_off0000f223.bin
bbceb40653ca732290459791c29e330c25a825d776f096f2a14c4110a931de05		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF223 10488 bytes
font_02_sfnt_off000109e0.bin
61d57d61de878e364ef0f562d5ab4ac303591eba757e8829a26049e4a8299b39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109E0 17024 bytes

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