Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba421fa532b05fe…

MALICIOUS

PDF

79.5 KB Created: 2021-07-14 05:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67ee13d2be39b502ca28eb264518a8f8 SHA-1: 68e77999ca4e57136331e1a0d73d7d3198abb152 SHA-256: 9ba421fa532b05fe726e9070448e66fbeb063592413150f425194f3c2ed9135d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The PDF contains embedded URLs that likely lead to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into navigating to a harmful site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5817

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/-MXWpcYQ7kA/square?utm_term=prefix+of+within
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec9457e0914637f38c48f1/1626117207835/not_answering_phone_quotes.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edc3669942ff19c764b488/1626194790901/how_to_unlock_other_characters_in_mario_party.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8f79883ae0c49023743fc/1625880472722/40471229576.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8c67d9ffc3426e8a496a9/1625867901672/43154894775.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_off0000d9b7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B7 16792 bytes
font_01_sfnt_off0000f1c9.bin
534b9342b451a5ad6a8e339819bda3047d2e6aa9e69add0c740c701c28934888		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C9 16672 bytes
font_02_sfnt_off00011cf6.bin
44b00e34298a51fa67c4d2520fa2a77895771111f24d712e006d80e9db5f7392		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF6 10124 bytes

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