Malicious PDF — malware analysis report

Static analysis result for SHA-256 4415623f0b0a020c…

MALICIOUS

PDF

42.3 KB
MD5: 7c95b08562c50b9452f1aca4edafb652 SHA-1: 0ac0b1f420ab8cbe01c282cf584ed5930d75ab32 SHA-256: 4415623f0b0a020c05c6872c9f8436dc62e693a9e843af191d6d06f40130c05e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded script payloads and is flagged by ClamAV as Pdf.Exploit.Agent-36830. The presence of XFA forms and embedded files further indicates malicious intent. The embedded script, though partially obfuscated, appears to be involved in downloading and executing a second-stage payload, as suggested by the string concatenation and execution calls. The confidence is high due to multiple critical heuristic firings.

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
913d8d8b0073f986e0f7bbfafd64f41cd617bd5bd0b1cde8240034789a1c9d22		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42612 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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