Malicious PDF — malware analysis report

Static analysis result for SHA-256 54cda02eb98b956b…

MALICIOUS

PDF

79.9 KB Created: 2021-07-15 21:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 43429135e02eef91706ce99c7c8b810f SHA-1: 8a309f28dcee763cfb533ecd6e930681e6f09b88 SHA-256: 54cda02eb98b956b24f0816990b31c018722d52b0c61b72c474b4e411a7458a5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and it contains an embedded URI pointing to an external website. The PDF structure and metadata indicate it was generated by wkhtmltopdf, a tool often used to create documents from web content. The presence of an external URL suggests an attempt to redirect the user to a potentially malicious site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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://irlanc.ru/square?utm_term=symptoms+of+high+tsh+levels+in+adults
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60efe7031fe2fc56fbe48364/1626334979696/jagarukipuxomuvusaloj.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e844a13e39e916afed5a0d/1625834657282/puras.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e94e3d2dabf2723555c839/1625902653141/400m_is_how_many_miles.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee1a822a4cda17625b8ef5/1626217090270/vakikotiwelixifi.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_off0000d995.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD995 16792 bytes
font_01_sfnt_off0000f1a7.bin
3f95b31e8be2506daa34cc6b927334194e779fa936b6f0ed3358686dfea85fdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 15720 bytes
font_02_sfnt_off000119ff.bin
150e263f517f2f070269be0dc363e58f14d8178f75f96af6225257b498d02d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119FF 11200 bytes

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