PDF malware analysis — malicious · f86f2e0ab74f8fa9

MALICIOUS

PDF

1.6 KB

MD5: 4954269676ac23e80c32c5ba46af2ae6 SHA-1: 6560022cde48eccaa6a1fb93a57f0b1bc41d0b05 SHA-256: f86f2e0ab74f8fa9346d46db407e7b8849e62791033fc03e8b29841b3fb0c250

126 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_EVAL. The embedded JavaScript stream, named 'javascript_obj0009_000.js', likely contains code to exploit vulnerabilities or download further malicious content. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature of the file. The exact payload and execution method are obscured by the obfuscation, but the presence of eval() and String.fromCharCode suggests dynamic code execution.

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` `b83c14f9a50d2d94349e6eebdbd20cd330752facfe26748191b09aa48e331d9f`	pdf-javascript-stream	PDF /JS object 9 at offset 0xDC	3898 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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