PDF malware analysis — malicious · 0100cb530e0be4d7

MALICIOUS

PDF

3.2 KB

MD5: 5722710eb833ad42d12aaa33eeb5175a SHA-1: 246b1b4991958a4cb766c7da8c8674d0c899e9a9 SHA-256: 0100cb530e0be4d7e1aeb3adc5d55eb786e2aa1ac8d87c36d20b1e7c26f320ba

206 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes an unescape function, a common technique for obfuscating malicious code. The script appears to be designed to execute a command, likely to download and run a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Exploit.Agent-36121 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36121
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `297d786083849de33e58b9e52048d7cd238823b2177382c01ed20151d0bc292c`	pdf-javascript-stream	PDF /JS object 7 at offset 0x9C9	490 bytes

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