PDF malware analysis — malicious · ba85adf51d8bf49d

MALICIOUS

PDF

1.6 KB

MD5: 021ed40ca66b13e1e5c5ed845b2fc8e5 SHA-1: 27d70b966f77c7f18ea7034aba0e3d082742e09b SHA-256: ba85adf51d8bf49d24a3086c5afae375b83697da5ea0b38bc0abfdfbdb55d82f

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 ClamAV detection further confirms its malicious nature. The embedded JavaScript file, 'javascript_obj0009_000.js', is likely responsible for executing the malicious payload. The obfuscation suggests an attempt to evade detection, and the use of eval() and String.fromCharCode() points to 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` `12e63920334456218dd1e1a595502b69d7d0c559570f6485c4e93775b8ed05da`	pdf-javascript-stream	PDF /JS object 9 at offset 0xDC	3906 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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