Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e942351a93063d…

MALICIOUS

PDF

18.3 KB
MD5: 8e20003f78967974c3dd4363e9afc837 SHA-1: f8762fec04192ab286dfaaa04708c81c22315729 SHA-256: a4e942351a93063dd1df0f5468331788a5e112cfd31b31c7ace2e9808fd900df
148 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains an embedded script payload and utilizes XFA forms, both indicators of malicious intent. ClamAV detections further confirm its malicious nature, identifying it as Pdf.Exploit.Agent-36789 and Pdf.Exploit.Agent-36809. The embedded script is likely responsible for downloading and executing a second-stage payload, as is common with this type of exploit.

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-36789 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36789
  • 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://www.x&#102;a.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000325.bin
7796428061139fd06eda88516d588a04b75f0e961da5f35949ba7f1bba17214e
pdf-embedded-script PDF raw stream script payload at offset 0x325 17990 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36809
Obfuscation or payload: unlikely