Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8aa488f6e334721…

MALICIOUS

PDF

19.0 KB
MD5: ce3a53c1a4b78e054e8ab2d25f9c5635 SHA-1: 1ef03260ee16e703c3b34d16ffbef64f9a07bab6 SHA-256: a8aa488f6e33472126fbd8926a5d552a59dd7ffd96224d8edbf3ee073b8175bd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically detecting it as 'Pdf.Exploit.Dropped-78'. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting the PDF is designed to exploit a vulnerability and download or execute a secondary malicious file. No document body text was available for further analysis of the lure.

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 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
6d6e56272e00ed89e20e344132b7697f36a6d61205b3e1f8d14a4c30d7279347
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18739 bytes