Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9563ccf030b86d…

MALICIOUS

PDF

4.2 KB
MD5: ae1e14b4c423b9fb62bb95842e3541f7 SHA-1: dfa05c1e88dd89a07dc7592f63df38ab07a482c3 SHA-256: df9563ccf030b86d1e1a4e25fd03a29dbe93e9d73746bf4eff3787e23e699665
66 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment

The PDF was flagged by a machine learning classifier with high confidence as malicious. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it is designed to deliver a secondary malicious component. The ML_NYX_PDF_MALICIOUS heuristic firing strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
56dbdb487b2c3669c42369c93949621008c68db5557cabaae3638279f6d1ebe5
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xEA 12909 bytes