Malicious PDF — malware analysis report

Static analysis result for SHA-256 9975a324c50af38a…

MALICIOUS

PDF

79.7 KB Created: 2021-07-14 07:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b4b0e1d175392c88a20eaf12bd3bf460 SHA-1: ea733975669b51ef8635b349c8c55b86c05ad815 SHA-256: 9975a324c50af38ad0a6624e8299500b6f58c6a748746be4d76c5181bc62f639
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic 'Pdf.Phishing.Trojan-d2568dad23a94d95' strongly indicates a phishing or trojanized PDF. The presence of embedded URLs, even if some are marked benign, suggests an attempt to redirect the user to malicious content. The file's structure and metadata indicate it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier clean score 0.1658

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/u8n3KCQdUYc/square?utm_term=electron+dot+structure+of+ethanoic+acid
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e924c40a287971af9a1bbc/1625892036384/zubuj.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edc35d670c344ea75a2e47/1626194781734/tommy_dewey_mindy_project.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_off0000d3cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CB 16792 bytes
font_01_sfnt_off0000ebdd.bin
6af0eed721ee9d43101546f25357890416623269e12983248d229fe293f5e7b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDD 17248 bytes
font_02_sfnt_off000118f9.bin
ba8a9b86d5aacbe9795170f82194298831e89166f826a202c43a00f33069d368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118F9 10656 bytes

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