PDF malware analysis — malicious · 397cb462086a12e3

MALICIOUS

PDF

11.9 KB

MD5: c519ff2608dc162b4c5e5932d4bb194c SHA-1: 607a156f91414e33e4801b8f64e484f3bfaf3f5c SHA-256: 397cb462086a12e3fcc544f97fcddc60f97615b7de303ee88c6d37cc2a2b1854

126 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The file was detected as malicious by ClamAV (Pdf.Exploit.Dropped-78) and a machine learning classifier with high confidence. It contains an embedded script payload and is identified as an XFA form, which are common vectors for PDF exploits. The embedded file artifact further suggests it's a dropper or exploit loader.

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
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.
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 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` `6bdaa7be2206205acba672e1251f194d077525b7b2b0a7d9b2dd21759c400558`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC8	11398 bytes

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