Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a40ad4e5604957…

MALICIOUS

PDF

42.5 KB
MD5: b19b50014036a11ba446a8bd334a2c5b SHA-1: e04eeb0ed8d681d17d93d394689127ef3f83acbf SHA-256: 03a40ad4e560495781d06c7bfee98825a2a527c3363eaedbad3083857b39fc17
176 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by multiple engines, including ClamAV which identified it as Pdf.Exploit.Agent-36830. The presence of XFA forms and embedded script payloads suggests an attempt to exploit vulnerabilities within the PDF reader to execute arbitrary code, likely leading to the download and execution of a secondary payload.

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
51345b248024a4e02b7ac9812c2503c622a43d37148d32521a9ebe0356cd3652		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42758 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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