Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5bdc627c1dda3d0…

MALICIOUS

PDF

11.7 KB
MD5: 0d72a713a4a531f4e06c7c05ef53cba2 SHA-1: d4e4352d6e0bdccfcb34cf338c623f422e09391d SHA-256: e5bdc627c1dda3d0221a71b8f847a7ffea98fe7041997184e594e8765d88ad85
126 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as Pdf.Exploit.Dropped-78. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to exploit a vulnerability and drop a secondary payload. No document body text was available for further analysis of the lure.

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
7ca02d3bb38959512b4d27e186abf533b16275a2e284ccbfcc740bdc207a5ded
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11178 bytes