Malicious PDF — malware analysis report

Static analysis result for SHA-256 159d9108a2ae0302…

MALICIOUS

PDF

11.8 KB
MD5: e67eabb9ee48c7b434c3764bf9ecc132 SHA-1: 55aedefc5907eca32b972b14db2be60bfb2f1e53 SHA-256: 159d9108a2ae03026d54be9d78309558679ce2d8c67c00f239db80d46cf2a666
116 Risk Score

Malware Insights

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

The PDF sample was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains an embedded file and XFA form, indicating it likely exploits a vulnerability to download and execute a second-stage payload. The embedded file name 'embedded_file_obj0008.bin' is the primary IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
75b34be759dc38b5a12664cf362755d0870d735d88649bfe24cedac46a82851b		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11325 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.