PDF malware analysis — malicious · 31eefab3d14bce85

MALICIOUS

PDF

14.7 KB

MD5: a2b21df8f5bbe399e281472682933139 SHA-1: d0f7772afb19cf89081c18efbf1d18de9f688715 SHA-256: 31eefab3d14bce856e9e08b159493f36a0294d1c76b109304ea287f11cf3cadf

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF contains an embedded script payload and was flagged by multiple detection engines, including ClamAV, as a malicious exploit. The ML classifier also returned a very high probability of maliciousness. The embedded script is likely responsible for downloading and executing a secondary payload, as indicated by the 'Pdf.Exploit.Dropped' and 'Pdf.Exploit.Agent' detections.

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
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.
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://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_00000329.bin` `701b9eaa4865a7e709ff6c6a4724e4b74c08ed3bfa0df00cd6f6b80987f0f67c`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14274 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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