Malicious PDF — malware analysis report

Static analysis result for SHA-256 a048467c875147b6…

MALICIOUS

PDF

42.9 KB
MD5: 2c0d0c6be23af18d36628519f842cc73 SHA-1: 9eb7eca5e23e11f38a261604f7261bd3b164ed6e SHA-256: a048467c875147b605c5aa65a55e6b2bae65804c4fcd9d1c1d55c57e73880f6a
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: Malicious PDF

The PDF file was flagged as malicious by multiple heuristics, including ML classification and ClamAV detection (Pdf.Exploit.Agent-36830). It contains an embedded script payload and an embedded file, indicating it's designed to exploit vulnerabilities and deliver a second-stage payload. The presence of XFA forms and embedded files are common characteristics of PDF-based exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_file_obj0008.bin
523815af9ae40a96350a4bf5f367cec2dc7b5f7321b845e1b0d0acd3125176ab		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43145 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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