Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef8b573e9c5728d8…

MALICIOUS

PDF

42.2 KB
MD5: 3d616b075cbb5459a5521d070bbc95b8 SHA-1: 8348bb56630e5ed6d06ba946e60554ba16fb30ac SHA-256: ef8b573e9c5728d806d50f3024adf16c9b7e4f581e352636750b591fdb4f9c12
156 Risk Score

Malware Insights

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

The PDF file contains embedded content and triggers heuristics related to embedded script payloads and exploit attempts, as indicated by ClamAV detection as Pdf.Exploit.Agent-36830. The embedded artifact 'embedded_file_obj0008.bin' is likely the delivered payload. The XFA form structure suggests a potential vector for exploit delivery.

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
96760408b708d336e56545ab188b074dfc081eb0aea795750dc26c700cdd30b5		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42470 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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