Malicious PDF — malware analysis report

Static analysis result for SHA-256 74be77e4f1848e8a…

MALICIOUS

PDF

15.4 KB
MD5: 36e064606ac2053fb24437b7f002cddb SHA-1: cbccb1bd558ccef72574ff610472e90393ec2352 SHA-256: 74be77e4f1848e8af20b08549351440ebfc3eb88dbfad99caf8e93750af1d5df
116 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded script content and is flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. The embedded script likely facilitates the download and execution of a secondary payload, as suggested by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'Pdf.Exploit.Dropped-78' detections. The benign URLs present do not detract from the malicious indicators.

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
2148601bf7e66b70ac81cebcbc33143bb83979bf35b6225390b833668f1db50e
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 15013 bytes