Malicious PDF — malware analysis report

Static analysis result for SHA-256 046ea5626c8f0cbc…

MALICIOUS

PDF

11.7 KB
MD5: 7dc27e81a26c891f2451c2e5e79fd8b1 SHA-1: 4fac0859fc99b8f5f1b205ce481aac1c7055cfb7 SHA-256: 046ea5626c8f0cbc7cadbab36cf9fc6de4b4c277c636219be6913d4a28a445ed
116 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ClamAV and an ML classifier, indicating it contains an exploit. The presence of an embedded script payload and an embedded file suggests it's designed to download and execute a secondary malicious payload. While specific IOCs beyond the file hash are not directly extractable, the exploit nature points to a common attack pattern.

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
ed63e3ae7c3c31c2a3074ed6d6e8c943629271dc20c252e5297a9aa48b523918
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11206 bytes