Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af9ed66fed000df…

MALICIOUS

PDF

42.8 KB
MD5: 7e66e37727c2417e905f586d4ed0d39a SHA-1: 9c9aa6814941c5115516516ed5ca369570b4608e SHA-256: 1af9ed66fed000df50cc56e71d055ca85afc11a87af85b27120b425bb4d9e7a2
156 Risk Score

Malware Insights

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

The critical ClamAV detections 'Pdf.Exploit.Agent-36830' on both the main file and an extracted artifact strongly indicate a malicious PDF exploit. The presence of an embedded script payload further supports this, suggesting the PDF is designed to download and execute a second-stage payload. The document body content appears to be obfuscated script rather than user-readable text.

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
f6a47ae1d607c045ab33a92bbfbe3bc1bcc2978482a5d1890db05804757dce5b		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43055 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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