Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad36175733a8724…

MALICIOUS

PDF

77.7 KB Created: 2021-07-13 21:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 51dc02e17bfd88b2664984a4870796e7 SHA-1: eeedfbd705b03cc224055dc9843d108a1bcfb77a SHA-256: 6ad36175733a8724ff0dd884fa669908f7cde113178a02eb1842690f711e453f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, suggesting it is designed to exploit vulnerabilities or deliver malicious content. The presence of embedded objects and the nature of the detection point towards an exploitation attempt for client execution, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

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/CcIy6vlvkUk/square?utm_term=pregnant+dog+eating+grass
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eda578a5c02c6ff4db1cdc/1626187128392/63298727028.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edbf71cc8e436e46625cd4/1626193778067/14688768955.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec9246bc6eee4b058f6e3f/1626116679020/polinumig.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_off0000d19d.bin
a80a8e46f75ff146de0ff2b59ad54810173e7e5746c1f55ff714ff0487ac31bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD19D 16224 bytes
font_01_sfnt_off0000fb84.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB84 16792 bytes
font_02_sfnt_off0001139b.bin
53a8c933c7a5df0de3e3a5e85471d6e8ddf7a18315319d2b342c6bb74f1cc5ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1139B 10376 bytes

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