Malicious PDF — malware analysis report

Static analysis result for SHA-256 917553048e980df4…

MALICIOUS

PDF

42.7 KB
MD5: 7153cf1d27e9894f3fc68ee121f3d566 SHA-1: c2c66f37eff9855e0d0eba6fae9a07eb54d9758c SHA-256: 917553048e980df437e76386ebdab23557da47d77c553700f74e1365a9d1191f
156 Risk Score

Malware Insights

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

The PDF contains embedded content and a script payload, as indicated by multiple heuristic firings including 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'CLAMAV_DETECTION' for 'Pdf.Exploit.Agent-36830'. The embedded script is likely responsible for executing the malicious payload. The presence of XFA forms and embedded files further supports its malicious nature.

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
86842f5e333268d77c7a04ec9c6c32b480a40c6796cc9f089869725fd8757044		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42933 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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