Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c0770aca96ed358…

MALICIOUS

PDF

11.8 KB
MD5: 3f20bf0b3d006a4a89b17990ff7efad4 SHA-1: 7f8b0f0142fb006cb8c69f8cd57e0beb387056c2 SHA-256: 5c0770aca96ed35843a9f538930db62b895acb60e8697bb3075849f5a9def490
116 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier, indicating it contains an exploit. The presence of embedded script content and an embedded file further supports this. While specific URLs were benign, the core functionality points to exploitation for client execution, likely delivered via spearphishing.

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
6ddb89972c0a160c84663085a437eab2bce464f37471e48ef72080aa1e0abbc2
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11281 bytes