Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff4232c3b86b3ee…

MALICIOUS

PDF

42.9 KB
MD5: cf9da8d918572683714bf720782f159f SHA-1: 5d66253800f1bcb2236facef38aa12ce912fa48b SHA-256: 1ff4232c3b86b3ee46361a766ebbae6fb5055fd063470871085e934c13f423ea
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: Malicious PDF

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier, with ClamAV detecting it as 'Pdf.Exploit.Agent-36830'. The presence of an embedded script payload and an embedded file suggests it is designed to exploit vulnerabilities and download or execute further malicious content. The document body contains obfuscated JavaScript, indicating an attempt to hide malicious functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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
0a782187401f8d977b41fa8ed6aef5cb729de48a31496d0c022dc5fe62ecb1ef		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 43128 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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