Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fbda8dbbe97484…

MALICIOUS

PDF

19.2 KB
MD5: 0da98d66b27f790e05be74007510e0f8 SHA-1: e0848ba1f44250a01665aac884de270985252fb0 SHA-256: 96fbda8dbbe974846253cd288918b1c34df9bc08b47947d37141a104cb27f15b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious PDF

The file is identified as a malicious PDF by multiple high-confidence heuristics, including ML classification and ClamAV detection (Pdf.Exploit.Dropped-78). The presence of an embedded script payload and an embedded file further indicates malicious intent. While the specific exploit mechanism is not detailed, the combination of PDF structure and embedded content strongly suggests an attempt to exploit a vulnerability and deliver a secondary payload.

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
a84cc2b7b923ad09766a83968fdbb1e20f201d00856d438cdff3970e15652921
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18883 bytes