Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a48c78304c72d2…

MALICIOUS

PDF

42.7 KB
MD5: fdd36f75076bff7bd5a9522b0a4aacaa SHA-1: 979facb9546cba2a6dafdd0474888f22d3f3a7ba SHA-256: 94a48c78304c72d28a25f327c20786e863592aa5d5699ee52be2de67a08a5557
186 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including critical ClamAV detections (Pdf.Exploit.Agent-36830), indicating it contains an exploit. An embedded file was also detected, likely serving as the payload. The ML classifier strongly supports the malicious verdict. The embedded URLs are benign or unknown and do not appear to be directly involved in the exploit.

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
361f52e925b5d96cfa9c3b3280fe58ba63367872131eff3ad81238c28b98e7c6		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42995 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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