Malicious PDF — malware analysis report

Static analysis result for SHA-256 9590200f091853d2…

MALICIOUS

PDF

19.5 KB
MD5: 9ab12420b77c52efa59383a8b3632c75 SHA-1: f82d688b6e674794ab3e32019b935ae9110e408b SHA-256: 9590200f091853d2baddd8a70a4fe4fbb0572d4c69302f1b32b4502886f0500c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.002 Phishing: Spearphishing Attachment

The file is identified as a malicious PDF by multiple high-confidence heuristics, including a critical ClamAV detection (Pdf.Exploit.Dropped-78) and an ML classifier. The presence of an embedded script payload and an embedded file suggests the PDF is designed to exploit vulnerabilities and deliver a secondary payload to the user.

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
5ca3cce0c88ba27f640c3ecb0d9d8a17bd7fb0a62427c8a214f2a67326aa6746
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 19203 bytes