PDF malware analysis — malicious · 846d4a14474fd305

MALICIOUS

PDF

52.9 KB

MD5: f239bd1b77b235139531c3a1abf50285 SHA-1: 68c505873c44774b25a4e12756e69db8c031eeff SHA-256: 846d4a14474fd3052d8673520e08c7cfa1b81420be34a5f43f5bc95da47d38aa

186 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged as malicious by multiple engines, including a critical ClamAV detection for 'Pdf.Exploit.Dropped-93'. It contains an embedded script payload, indicating it's designed to exploit vulnerabilities within the PDF reader. The presence of XFA forms and embedded files further supports its role as a dropper for malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9976

Heuristics 6

ClamAV: Pdf.Exploit.Dropped-93 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-93
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00000390.bin` `c9a6a7e4dde84230313f38acabffcbb6b606b0b85ad6b5a81b575678b34a881c`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x390	54142 bytes
Detection ClamAV: Pdf.Exploit.Dropped-93 Obfuscation or payload: unlikely

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