PDF malware analysis — malicious · 3b8300e2661fefe2

MALICIOUS

PDF

3.9 KB

MD5: 8214464a313597c01531d28deec0a2af SHA-1: b894bf484477b4835f498024f5a343a0917b3b99 SHA-256: 3b8300e2661fefe285bef7a1d9024c180c8e2e76732113e5c3d3ef1d699d55ca

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ClamAV detection for Heuristics.PDF.ObfuscatedNameObject further suggests malicious intent. The embedded JavaScript file, javascript_obj0040_000.js, is likely responsible for executing the exploit or delivering a secondary payload. The use of String.fromCharCode in the PDF also points to obfuscation techniques commonly used in malicious documents.

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_obj0040_000.js` `c6c10d465f6b5ca921ae8c697e7b97e37f0a097fe3155e6e5f48a3574de7c2b9`	pdf-javascript-stream	PDF /JS object 40 at offset 0x63	16105 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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