Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9068553ff42809…

MALICIOUS

PDF

80.2 KB Created: 2021-07-13 16:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ebaa7c16676fcff4ed365ead9f24b862 SHA-1: 0b43f51bea8411064f31a3f556f4e4582f764ed2 SHA-256: 0e9068553ff42809d77244f18f186c88f754403e90b2b937c986beb433ec6f06
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan behavior. The presence of a visual download button and an embedded URL, even if benign, suggests a phishing attempt to trick the user into downloading a payload. The document's metadata indicates it was generated by wkhtmltopdf, which can be used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier clean score 0.1658

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/kVSxLQpkboc/square?utm_term=gta+5+for+pc+download+torrent
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e806a01873c46ac93b4a58/1625818784813/military_court_martial_manual.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecb53cfb12492bbb584916/1626125628203/pitch_perfect_3_free_streaming.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_off0000cdaa.bin
0c4f84b0e5e0633ee4499ce5eebbc3c90cad1fa947f8c8451d3d5cc715f5da7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAA 21524 bytes
font_01_sfnt_off0001049c.bin
6957b8d1084a49453032a61c3eea5df31f23b805271dc59bc6f12810794759ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1049C 10612 bytes
font_02_sfnt_off00011d31.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D31 16792 bytes

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