Malicious PDF — malware analysis report

Static analysis result for SHA-256 f692b77019f8a3f2…

MALICIOUS

PDF

79.1 KB
MD5: d7ddd60afa5067bf96656f5414dbf77d SHA-1: 5b9adcf46137ea593f0ee30572418d00c153cec8 SHA-256: f692b77019f8a3f28534639543de0f549a9eec851b60dcfa2cfc2fb067f85fd8
178 Risk Score

Malware Insights

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

The PDF was flagged by multiple high-confidence heuristics, including ML and ClamAV, indicating it contains malicious content. The presence of an XFA form and an embedded script payload suggests an exploit is being delivered. ClamAV detected an embedded JavaScript exploit, further supporting the malicious nature of the file. The embedded script likely downloads and executes a second-stage payload.

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_0000023c.bin
afcfdb0c1a1f532f7aa72d4c1238b5f63f05ab80cc59de5515db19a4b6905bcc		 pdf-embedded-script PDF raw stream script payload at offset 0x23C 80281 bytes
Detection
ClamAV: Js.Exploit.HTML-29
Obfuscation or payload: unlikely

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