Malicious PDF — malware analysis report

Static analysis result for SHA-256 da39b15a1ef5c451…

MALICIOUS

PDF

19.3 KB
MD5: 7898bebe70926964cfe5ce4ea1f456c6 SHA-1: 2f6e2df9c08ac6456be8f7308cacb29dc3659633 SHA-256: da39b15a1ef5c45189beb51841ddbf5b19e7e595f440789f74ed5b3ce1a4248a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains embedded script content, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. ClamAV also detected this file as Pdf.Exploit.Dropped-78, suggesting it's a known exploit. The embedded file artifact further supports the delivery of a secondary payload. The exact nature of the script's execution is unclear due to obfuscation, but its presence strongly suggests a malicious intent to exploit vulnerabilities or download further malware.

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
1fd5de88af03794628d5f13ea89c381a17424baf55c377c48a9b3408fc560a78
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18987 bytes