PDF malware analysis — malicious · a797090ade93adaf

MALICIOUS

PDF

14.6 KB

MD5: 2cb86fff9d7da02b9e927fe8241b485d SHA-1: 9d69b1d543b67fd178a5722b21b07f3c7d1c4bdf SHA-256: a797090ade93adaff3cc4674fd8c174f9e0a44d2005d1cf54e873cd994ff58ad

178 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains an embedded script payload and was flagged by multiple detection engines, including ClamAV, as a malicious exploit. The ML classifier also strongly indicated maliciousness. The embedded script is likely responsible for downloading and executing a secondary payload, a common technique for initial access and further compromise. The presence of XFA form elements is also noted.

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` `2ef858e541c6566d353ea56ee47ab872ba9ae27944f67d2ee19b52c2571f0ae0`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14208 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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