Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee62b52139e10c98…

MALICIOUS

PDF

19.2 KB
MD5: 191a0ab94807c1927123d46a4a4dba32 SHA-1: efc8fcea38eda78d9f4723d6559a69f517769d64 SHA-256: ee62b52139e10c98be4e83a3858c4f1b2ddeb9c85eb5d7dfbd07412d1a692c57
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers 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 vulnerabilities and download further malicious content. The embedded URLs are not directly indicative of malicious activity.

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
dfee92a28fb49adf1414b87be9e03c41c2be61d9c0643cb8bae4afb6264a26b2
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18857 bytes