Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ab936f83b3ba0a…

MALICIOUS

PDF

42.3 KB
MD5: 628494890a6d88491813b259c4968f61 SHA-1: d4422078fa7b4b1881b5e958a3c9a20db30f3153 SHA-256: 11ab936f83b3ba0a5bb8c33746a8b8e4da1323c228da9363af85c369b4921042
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The file is a PDF document identified as malicious by ClamAV and an ML classifier, indicating it contains an exploit. Embedded scripts and XFA forms are present, suggesting an attempt to execute arbitrary code. The embedded artifact is also flagged by ClamAV, reinforcing the malicious nature.

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 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 script payload in PDF stream low 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 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
d74d919a3882f5e035e7037ec57593ceaea09571ab48d45c3aaa51176b9cc057		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42550 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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