PDF malware analysis — malicious · 50ae5a2d8d401ef7

MALICIOUS

PDF

12.8 KB

MD5: 00bd5e2b42775d2eb6c3c8182a456a12 SHA-1: cf332ce4f151ee3c311bcfb86940a8fc8d9ecd9b SHA-256: 50ae5a2d8d401ef7dea355824e409ceeace0b0553cbfc222cade9a9033a13c40

142 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating embedded JavaScript and exploit payloads within PDF streams. The embedded script is likely responsible for executing the exploit, as suggested by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' firing. The presence of XFA form elements and JavaScript actions further supports this. The specific exploit and delivery mechanism are not fully discernible from the provided script content, but the overall pattern points to a PDF-based exploit.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
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.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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_00000374.bin` `66a9f4ac97f675c9029c1e86be9ebb92d1af2dcc44b361d81608226a27837388`	pdf-embedded-script	PDF raw stream script payload at offset 0x374	12245 bytes

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