Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfaec7e179a78727…

MALICIOUS

PDF

19.3 KB
MD5: ce8c871e19e3d0ed550e1d0309e26294 SHA-1: 85c43a43ddfb0a4829457c961ef54e8811274f7d SHA-256: dfaec7e179a7872764141f2c7528870e1ee9dc33b8cfe9dc427ac07838152aee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection as 'Pdf.Exploit.Dropped-78'. The presence of an embedded script payload and an embedded file strongly suggests the PDF is designed to exploit a vulnerability and download or execute a secondary malicious payload. No document body text was available for analysis, but the embedded file and script firings are sufficient indicators of malicious intent.

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
99e6d2691f322b3e1d781eb4861ee58ff850763a0cc1861fe77ceed1676e5117
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18998 bytes