Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4c43d59a8b1ee1…

MALICIOUS

PDF

42.5 KB
MD5: 3fa9096bd3676b22331e7c021703a9c5 SHA-1: 607db623e30951ddac5f9cffeff5df7921104b41 SHA-256: db4c43d59a8b1ee16db33b3dda9aca9775d92b6a0cb4bdbcb6d9e528998799b4
156 Risk Score

Malware Insights

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

The critical ClamAV heuristic firings indicate this PDF is malicious and contains an embedded script payload. The embedded file artifact further supports the delivery of a secondary malicious component. The embedded URLs are not directly indicative of malicious activity, but the overall structure points to a PDF exploit.

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
7c954147fc33bced91ed8b39b544cf8e67494cdc2674e1a420efff4f64c2c282		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42752 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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