Malicious PDF — malware analysis report

Static analysis result for SHA-256 2671de90f7e24565…

MALICIOUS

PDF

42.2 KB
MD5: 6c2eb0e79a3466c05d7002c27d34e83a SHA-1: 27e5c6686d41a1b073a4de248ac07b48f9c6bf11 SHA-256: 2671de90f7e245654e9c6447805ff4e86fb7ea7036a69970befaf717b2faeb72
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The critical ClamAV heuristic firings indicate this PDF file is malicious, specifically identified as 'Pdf.Exploit.Agent-36830'. The presence of an embedded script payload and an embedded file further supports the malicious nature. The file likely exploits a known PDF vulnerability to download and execute a secondary 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
cfdf135ccf61c28bdfb8b7a1bdb53461ecf9b304ef316dce694dd5c7d8dcd79e		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42497 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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