PDF malware analysis — malicious · 2b5e6c9363388a41

MALICIOUS

PDF

14.6 KB

MD5: 35b14d4450a0b799e26faf27e70374a8 SHA-1: eeca1995ff72f23efc178c24dc554600bb754b6d SHA-256: 2b5e6c9363388a4133c4a7994162508e2fb625c49276afe825bea3c50a307c2e

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detections indicating it is a malicious exploit dropper. An embedded script payload was also identified, suggesting the PDF is designed to download and execute a secondary stage. The presence of XFA form elements is noted, which can sometimes be leveraged for exploits.

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` `41fb51b51cb574564df9a4a77322b09eb623701eeba3222e78e5279aa3c12981`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14192 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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