Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b64fa5987d5de78…

MALICIOUS

PDF

79.1 KB
MD5: 5732ab3251888326182a0013a348a844 SHA-1: 7af09f2df5da491518deb5aa782b70dd68c4a2bf SHA-256: 1b64fa5987d5de78d1c9ed03f80473b6f38d3d96b775c7a4c025972e08c73cbd
148 Risk Score

Malware Insights

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

The PDF document contains an embedded script payload, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV detections (Pdf.Exploit.Agent-6136306-0 and Pdf.Exploit.Agent-36769) confirm its malicious nature, suggesting it exploits a known PDF vulnerability to execute a secondary payload. The XFA form structure is also noted, which can sometimes be leveraged for exploits.

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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.
  • 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_pdf_script_0000023e.bin
fbba0db9426e4a485a3deb12fb92eb3b53499aa6a6f070275648f1a871cb6216		 pdf-embedded-script PDF raw stream script payload at offset 0x23E 80301 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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