Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4cbe552cea10e42…

MALICIOUS

PDF

82.4 KB Created: 2021-07-12 21:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0ece0b30a147efac610da77bc60ef09 SHA-1: 30a6083a267b2841dc3cc9c7c3d53273e8c44ba3 SHA-256: f4cbe552cea10e42b45a88640c1fc82e32c06658721a47e9d01e8f654f2ed0da
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan, indicating a phishing attempt. It contains an embedded URI that points to a Google feedproxy URL, which in turn likely leads to further malicious content. The PDF structure itself appears to be generated by wkhtmltopdf, a tool often used to create PDFs from web content, which could be part of the obfuscation or delivery mechanism.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4720

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/AG-UZpNbJGc/square?utm_term=mobile+bartending+services+near+me
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7722bdd82073f6fdc4b7/1626109730999/xened.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7730950202184f0f3cc7/1626109744894/sites_in_dominica.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e776da1bd7543d7b5beca3/1625781979063/4878612670.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbf0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF0 16792 bytes
font_01_sfnt_off0000e407.bin
cec16ecda009637b4ee5ccde25d170cc920c603dd3ab31422bfd621e26e14ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE407 10912 bytes
font_02_sfnt_off0000fd0e.bin
6d636ebcb28a43c11a0b96216d988d0aaa25e428b847d4e039b2a2a6b6e27b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0E 16068 bytes
font_03_sfnt_off0001122a.bin
cdee67838106450355d0a3fff7ab16286f13e3bb8ee304d06beba53f53e6b6bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1122A 16736 bytes

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