Malicious PDF — malware analysis report

Static analysis result for SHA-256 afaf8141dc587e14…

MALICIOUS

PDF

94.1 KB
MD5: c96ef97fd8240342f7aad21f57435ea0 SHA-1: a0efe2b0b120f6134963ac82cf5cdca85acc73f0 SHA-256: afaf8141dc587e14dcff10f1a15ab59bcef8cfadaae8df07c6f4fd7f85084119
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

The PDF utilizes XFA forms and contains an embedded script payload, as indicated by multiple high and critical heuristic firings including ClamAV detections. The ML classifier also strongly flagged this PDF as malicious. The embedded script is likely responsible for delivering the exploit, though its specific actions are not detailed in the provided evidence. The embedded URLs are related to Adobe XFA and do not appear to be malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • 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.
  • 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_pdf_script_00000246.bin
426767edb904f4e60ecab0cb60e75f770041b1ec08ddd29b474762d5c898360c		 pdf-embedded-script PDF raw stream script payload at offset 0x246 95638 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36769
Obfuscation or payload: unlikely

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