PDF malware analysis — malicious · b6645c51cd98794e

MALICIOUS

PDF

1.6 KB

MD5: 89977a94422d4953e15096f9ee27eba4 SHA-1: 2f295551887008a37f7d638da10806762448b59e SHA-256: b6645c51cd98794ec50c226256c3a4ac42a8c8f4a214df08a66769ad24b40e3d

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The embedded JavaScript stream, named 'javascript_obj0009_000.js', is likely responsible for executing malicious code. The ClamAV detection further confirms the malicious nature of the file. The exact payload or execution method of the script is not fully discernible due to obfuscation, but it is designed to exploit PDF vulnerabilities.

Heuristics 6

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
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_obj0009_000.js` `1ed471b78fb2389be268fc3c4db652ca1e2ef4b498825a4487f5b3ddcc5259b8`	pdf-javascript-stream	PDF /JS object 9 at offset 0xDC	3909 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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