PDF malware analysis — malicious · 1ca22a24c6a252e4

MALICIOUS

PDF

14.6 KB

MD5: 17e3b6b25f10ef8d9e1888a5ed5bf6c9 SHA-1: 26cac6b5812cf5a48895fffe3d74dd2b0f69223e SHA-256: 1ca22a24c6a252e4598afd7553f0d9839c80c04b9d324c0cc88b3ce183c4a23d

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF contains an embedded script payload within an XFA form, as indicated by multiple heuristic firings including ML classification and ClamAV detections. The embedded script is likely responsible for delivering a secondary payload. The presence of an embedded URL, though benign in reputation, is 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` `3f3858959be8d2650090f3337017d8f887f5583aeb1282effdc7d65ea99aed32`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14223 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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