Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5cfb10ab32d0f16…

MALICIOUS

PDF

42.8 KB
MD5: 7c23532526f14b6fa971934b79d4fefd SHA-1: c64dddefe128dea7f0f9c462cd26251bad597ae7 SHA-256: f5cfb10ab32d0f168a2fad67ae4877e83aa5680961c999a5b9279dce79a269a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The critical ClamAV detection 'Pdf.Exploit.Agent-36830' indicates this PDF is designed to exploit vulnerabilities. The presence of an embedded script payload and an embedded file further supports this, suggesting it's a dropper for a secondary malicious artifact. The document body contains obfuscated JavaScript-like code, likely involved in the exploitation process.

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
e86bb458769d82c01373e5af005ffb3925ca7084561e9b795c620a935799e3ce		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43104 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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