Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0ceab4f8c32aae…

MALICIOUS

PDF

19.0 KB
MD5: b09319960690a9dfacb5885b5c1ced16 SHA-1: 033db92e7cb4fbd1bdfde9f7bccf2e87f068769c SHA-256: 1e0ceab4f8c32aae80ceb0644ba9fbc318b09e5dbaa1276e2f19dfa83e8f9421
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV detection as 'Pdf.Exploit.Dropped-78', indicating it contains an exploit. The presence of an embedded script payload and an embedded file further supports this. While no specific script content was readable, the overall structure and detection names suggest it's designed to deliver a secondary malicious payload. The embedded URLs are likely related to XFA form processing, which can be a vector for exploits.

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
8852230dcd26aaf12b064b75c8d4dcee43e5658db99c1292c51f37ee06e76316
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18671 bytes