Malicious PDF — malware analysis report

Static analysis result for SHA-256 2804e01a20f3b99a…

MALICIOUS

PDF

11.9 KB
MD5: ac1fb3aa017fda9a7047efbd103c6515 SHA-1: dc86370ba77a43a0cb8c42ff6454191f50aeeedf SHA-256: 2804e01a20f3b99a4de5effe75d226202cce071e269f7d30386ef5dfc2dbedb8
126 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-78' and a high ML classifier score. The presence of an embedded script payload and an embedded file further indicates malicious intent. The PDF structure suggests it is designed to exploit vulnerabilities, likely leading to the download and execution of a second-stage payload.

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
111a0395c045319a6d5f4b4142e100e653c08fc89a4071dedf75ddc7755eb3cf
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 11387 bytes