Malicious PDF — malware analysis report

Static analysis result for SHA-256 518db6a194671835…

MALICIOUS

PDF

18.8 KB
MD5: f3bf10d0e67c9223e1bac9c8c1e274ba SHA-1: f863f0fbe275e8e8689d84c4a99e83fb071a0bca SHA-256: 518db6a194671835159e592598a5dc4d24ddb6df05c3f304362fd836cc9cc551
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it contains an exploit. The presence of an embedded file and script payload suggests it's designed to download and execute a second-stage payload. The specific exploit and delivery mechanism are not fully detailed, leading to an unknown family classification.

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
bedd16e039e8a8b8b12167d2566cbb4fe7858edb38776fb2197a7e79b1a174eb
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18512 bytes