PDF malware analysis — malicious · 1835a00d9d60b59e

MALICIOUS

PDF

14.9 KB

MD5: 13cbc402cec6ff5c2d4ca01e217b9667 SHA-1: 0b3e05f27ac0ecfa6e863486d501d3a21f02335b SHA-256: 1835a00d9d60b59efb682e573fbb5a45b84d8c27540e2a27420f84acc3fba224

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains obfuscated JavaScript, flagged by multiple heuristics as a potential exploit. The JavaScript is designed to download and execute a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent, pointing towards a common pattern of PDF-based malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 6

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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `f49410f132d5e19d5f7fcd3c68e384f5caec516f9988d90cef75b654859d2f8c`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A5	15677 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

Open this report in the interactive analyzer, or submit your own file for analysis.