Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6c11dcbd18d65f…

MALICIOUS

PDF

77.2 KB Created: 2021-07-14 01:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f9941a72404a824725af6d9a1ce1c0e SHA-1: 0bbb14e938e8f06e99d795bbf4ebdbe13108f5bf SHA-256: 9d6c11dcbd18d65f164a0a4ecfc91acfe9431005dd290d591d7fee7a90979d41
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple security tools, including ClamAV, which identified it as a phishing trojan. The presence of embedded URLs, although some are confirmed benign, suggests a potential phishing or malicious redirection attempt. The ML classifier also indicated a high probability of maliciousness. No scripts were extracted, but the overall indicators point to a malicious document likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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/~3/5JeRQhMeIYg/square?utm_term=linguine+with+prawns+and+chilli
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e94120309bd63f3d870b91/1625899296594/bokuwawoxutuxewoluri.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8efd6c14ff043cd5a74fb/1625878486974/easy_poster_colour_painting.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee0e886d75c50a5d401bdd/1626214024819/histone_protein_is.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e96024f4fe78435a3c7867/1625907236289/zukitowozof.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_off0000cc25.bin
4e7c6f16100aa1e65c4cbe74446839aaaf8272d016b84c5503cc581948ab8f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC25 10816 bytes
font_01_sfnt_off0000e4e1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E1 16792 bytes
font_02_sfnt_off0000fcf3.bin
d3d5a4a75f6ef604ed9eaefd9cd233c18f9169fb0bbca7e24c814ef288598c0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF3 16928 bytes

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