PDF malware analysis — malicious · 5f57325b0b0bbdba

MALICIOUS

PDF

11.7 KB

MD5: 4636ce1f75702f8c578ac35f6cc1895f SHA-1: 7e6dd3ae731d3a9b7c950f1a20c1b9ae72fdd79d SHA-256: 5f57325b0b0bbdba2d88008ad0a5c41ec53280fe8c7a1b6fa5d503cf56d90ac2

118 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including ClamAV detection as 'Pdf.Exploit.Dropped-78' and a high ML score, indicating malicious intent. The presence of an embedded file and script payload suggests the document is designed to exploit a vulnerability and download a secondary payload, likely delivered via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
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.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `44a96085aec4a6aed9991c1ee6cd3ddbae8f3ffca1e7bc05d57142b3280bb105`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC8	11248 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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