Malicious PDF — malware analysis report

Static analysis result for SHA-256 37360fe22a9a1e0b…

MALICIOUS

PDF

73.9 KB Created: 2021-07-13 18:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a3dbea438b982498d28ca8abc0557611 SHA-1: 1b21d9ce4f943229683e57598991ee890a2f2247 SHA-256: 37360fe22a9a1e0b1db355875fdc707fbede289f22682fcafa99ecd6ffe47403
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to 'wastran.ru', which is flagged as suspicious. ClamAV detection and ML classification indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the embedded URI is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7218

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://wastran.ru/square?utm_term=7+colors+of+rainbow+in+bengali
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed89cb6bb85f4a8d885ac3/1626180043320/xowiwavizagite.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed53eafb5306426ecd9147/1626166250218/72226888302.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7b56ff29cd6423db270d0/1625797999441/how_to_reduce_mb_in_file.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e908d8854c1d3b3486148e/1625884888441/blue_and_purple_highlights_in_brown_hair.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_off0000c026.bin
418fbbd3005d50543323d0d4ff5081bfb664a01bd8825b08bbc21f59302decdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC026 10592 bytes
font_01_sfnt_off0000d88e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD88E 16792 bytes
font_02_sfnt_off0000f0a0.bin
3d6a7d085de6862b251406af0181a0b9999ad9b7499fa91c79b2ccfc22781e2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A0 16776 bytes

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