PDF / .RM malware analysis — malicious · 0114ee7beb84d237

MALICIOUS

PDF / .RM

3.8 KB

MD5: c763e743192db161c749337048e3e392 SHA-1: 80d24e9bc93596c98d289949b3b2c9bb907472f6 SHA-256: 0114ee7beb84d23779448408ae7c9438ebcfc3df36105d68f0fe929433004f8a

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains obfuscated JavaScript, indicated by the use of String.fromCharCode and a large embedded JS stream. Heuristics confirm this is a PDF JavaScript exploit cluster. The script likely downloads and executes a second-stage payload, as suggested by the ML classifier's high confidence and the nature of such exploits.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0040_000.js` `e38433c076e275c83bc167f78243f067fc5f57c806c5f2104ea8bddfc3010f4e`	pdf-javascript-stream	PDF /JS object 40 at offset 0xA	16055 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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