Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d914c3111b285a8…

MALICIOUS

PDF

12.2 KB
MD5: e6f2550723fd7bf117933a4068350884 SHA-1: e2f9049355c32790de91607dd3359f6f229fb996 SHA-256: 7d914c3111b285a8892c15165eb38e46dbfe5b3262d1cac4223017ac9f98b144
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF file identified as malicious by ML classifiers and ClamAV with the signature Pdf.Exploit.Dropped-78. It contains embedded script content and an embedded file, indicating it is designed to exploit vulnerabilities and download a secondary payload. The embedded script, though partially obfuscated, suggests JavaScript execution, likely to facilitate the download and execution of the embedded artifact.

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
af5f05fb3c7e2b357e9b6014aebff31db3b44b3376c261a65cbde4ef20293313
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11699 bytes