Malicious PDF — malware analysis report

Static analysis result for SHA-256 794a59091a727bdf…

MALICIOUS

PDF

19.1 KB
MD5: b4c6c1e7efa10546307124eabc058397 SHA-1: 62f285da6f384e7b7be5e9a5e022d074cfd2e7c7 SHA-256: 794a59091a727bdf8063ec5b7f39579ab76edfc61d3bdc53dc4ab015901884a3
116 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV with the signature Pdf.Exploit.Dropped-78, indicating it exploits a known vulnerability. The presence of embedded script content and an embedded file further supports its malicious nature. The primary attack vector is likely spearphishing, with the PDF acting as an attachment designed to exploit the reader and download further malicious content.

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
a12788c965f11c3f185d24b8575c9b1fb625bf029aac41dd382527bd784faec7
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18807 bytes