PDF malware analysis — malicious · cfa35c5e44172149

MALICIOUS

PDF

14.0 KB

MD5: 484bab33021ff00c5bc89347aa6e086d SHA-1: 9f26e2bc1b22950ffc1d2646f5cb5676390a3c40 SHA-256: cfa35c5e441721497ba3fb5de2810a3a4ea3c693b3e841b1886cd5f51eb8a95c

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_FROMCHARCODE. ClamAV also flagged it as Heuristics.PDF.ObfuscatedNameObject. The embedded JavaScript file, 'javascript_obj0006_000.js', is likely responsible for executing the malicious payload. Due to the obfuscation, the exact functionality cannot be determined, but it is highly suspicious.

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_obj0006_000.js` `1135bca3557550b35a709b7feb7a4d975b620fb093d230ab04f8376311b581d5`	pdf-javascript-stream	PDF /JS object 6 at offset 0x18B	14302 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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