Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4c4b1a881880af…

MALICIOUS

PDF

11.0 KB
MD5: f605d2a366c2a7515e54406e9659d9c0 SHA-1: f6edd4028cb5e7cfc452efca051ababbfefc85e1 SHA-256: cc4c4b1a881880afc9424ce3533a828ba63c29ca31971ccd2edf210456c34051
118 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059.001 PowerShell

The PDF file contains an embedded script payload, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically classifying it as Pdf.Exploit.Dropped-78. The presence of XFA forms is also noted. While the document body is heavily obfuscated and unreadable, the embedded script and exploit detection point towards a pattern of exploiting PDF vulnerabilities to download and execute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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 http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000184.bin
55677984fca4b2102e9c04db011db8c51ceea08e3fd68abf74a27b9c8021694c		 pdf-embedded-script PDF raw stream script payload at offset 0x184 10584 bytes

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