PDF malware analysis — malicious · 7655464cebf9a1a1

MALICIOUS

PDF

3.9 KB

MD5: fd8cd14ac6cf626603e59203ecbff304 SHA-1: 83eb5f26f349167e0764bd2c979a56ad18d1d419 SHA-256: 7655464cebf9a1a1ce99f17752bc2d23f4b0933d7979cfce92fd76b51b09fcee

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was flagged as malicious by a machine learning classifier and ClamAV due to obfuscated JavaScript content. The embedded JavaScript stream, named 'javascript_obj0033_000.js', is highly suspicious and likely responsible for executing a secondary payload. The ML classifier's high confidence score and the ClamAV detection indicate a strong likelihood of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_obj0033_000.js` `48efe6aee656bca76a843b090c5381ad13aa280fa464f348fd0cdd2e91b2d1f0`	pdf-javascript-stream	PDF /JS object 33 at offset 0x8E	16105 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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