Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db2a3fb50f2b04d…

MALICIOUS

PDF

42.3 KB
MD5: aa84834d445e0798a2b4ef41fa801458 SHA-1: c7f638c13603eac7fd0055be45faeecd78b68320 SHA-256: 5db2a3fb50f2b04df920ddf3e3575c2d17e6096720e62d5b34b9aa943572e7ef
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics and ClamAV as malicious, specifically identifying it as an exploit. The presence of embedded script content and an embedded file further supports the likelihood of it being a dropper or downloader for a secondary malicious payload. The benign URLs present are likely decoys or unrelated to the malicious functionality.

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
af2a54d7173a6646eacd7d7906d7d6f85f32de0a2c5d6c2aa830205db9ba15cc		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42588 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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