Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6e8f4b52ea8ca2b…

MALICIOUS

PDF

42.6 KB
MD5: 429660f3f9eb1ca361a068a662b41b94 SHA-1: 73c275a3b6e6b48eb0e735d1078da6ee5006d07f SHA-256: d6e8f4b52ea8ca2beaeaa07ffbeb674e1ac68ce6a5bd3f9c0d66548ca9dc78df
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment

The file is a PDF document identified by ClamAV as Pdf.Exploit.Agent-36830, indicating it contains an exploit. Heuristics confirm the presence of an embedded script payload and an embedded file, both common delivery mechanisms for PDF exploits. The script itself is heavily obfuscated, but the overall pattern suggests it is designed to download and execute a second-stage payload.

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
099228463e1f488858ba717002c24d4aac6cb3ff9ca3154609eb68d11cfede29		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42825 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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