Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d9ca4e7dcc1773…

MALICIOUS

PDF

84.0 KB Created: 2021-07-12 21:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f75b1055ad565080fb15891188d5734b SHA-1: 7b389fa89a343fce1540ba1d219c770287a4afc4 SHA-256: f7d9ca4e7dcc1773aed89d1d26f25d3e5a009adfabe8f31e932597ec55f6e5c3
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a PDF phishing trojan. It contains embedded URLs, one of which is flagged as suspicious, suggesting an attempt to redirect users to a malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of embedded URLs and the ClamAV detection strongly indicate a phishing or credential-harvesting attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1542

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://feedproxy.google.com/~r/sq/ugae/~3/-MXWpcYQ7kA/square?utm_term=touch+me+nots+urban
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7a264d0799e4214bd5c74/1625793124109/unsentenced_prisoners_meaning.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8ca0137c4677c34621f9d/1625868801292/green_beans_starchy_vegetable.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_off0000e7fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FB 16792 bytes
font_01_sfnt_off0001000d.bin
d858402c99c7f12dcd648359057e628a0d46a6e489ad956a251f6fe98366434f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1000D 16696 bytes
font_02_sfnt_off00012b67.bin
bacefa3b1e74387cf29f0058ea1c0df7259213eb21e1a405587c6b1366bb5042		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B67 10560 bytes

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