Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb60f5e98ab082c0…

MALICIOUS

PDF

82.5 KB Created: 2021-07-17 00:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 032ada7998ce596c813691882fa239db SHA-1: 2d0de20c2f2a01e9335e86b29c7ff4eafbf11653 SHA-256: cb60f5e98ab082c039cd369ab40f54199af7dfa051a6975be7af089efcdf34d4
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 phishing trojan. The PDF contains an embedded URI that points to a URL, likely intended to redirect the user to a malicious site. While the document body is heavily obfuscated and unreadable, the presence of the embedded URI and the ClamAV detection strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0911

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/gOBB6uaVNRA/square?utm_term=grand+uncle+meaning
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e80c5b45e16b3be7ebade1/1625820251642/how_to_watch_godzilla_vs_king_kong_for_free.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f057916506dc6429e64701/1626363793370/north_park_trail_map.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb70.bin
ed6ab01325b35947fc19fbe9b055b9a08c40b33eca5664d024335b28045f65d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB70 10468 bytes
font_01_sfnt_off0000e2e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E5 16792 bytes
font_02_sfnt_off0000faf7.bin
53b994274451881a8f4d431875dec4f233c2927eab124398922150d3291432fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF7 17368 bytes
font_03_sfnt_off000128a8.bin
30a08209ce3fb7c2ebddc02a194d3d435a48e5c196eadb0df356352c7c6c6d33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128A8 16152 bytes

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