Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06305d27353f33e…

MALICIOUS

PDF

42.5 KB
MD5: ab7d5d658303d9dc253416385ccbb1bd SHA-1: 30a55887e3a1f67f23fb259da679bc6ca2b1b7eb SHA-256: d06305d27353f33ef0c4022d08f0f32b7c2256265f619d13c93177461305d9c6
186 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple engines, including a high-confidence ML classifier and ClamAV, indicating it contains an exploit. The presence of an embedded script payload and an embedded file further supports this. The embedded URLs, while not directly malicious, are related to PDF and XFA forms, which are common vectors for such attacks. The ML classifier's output of 0.999995 strongly suggests a malicious exploit is present.

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
ba52d328bf6070c14b033a6b8815d24826fc41f7ee787b21012d944ed3932087		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42810 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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