PDF malware analysis — malicious · d8a00a388cfd73a6

MALICIOUS

PDF

1.6 KB

MD5: 89272e79c135d7a1ad4e4f4901a11dc8 SHA-1: 600dae839bc4f9367688f2a7964a2fc8c204adaf SHA-256: d8a00a388cfd73a6a61beb00b4bb5ad21aee29d61211bca4ec2cbcdd3d64adeb

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains obfuscated JavaScript, indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL heuristics. The embedded JavaScript stream, named javascript_obj0009_000.js, likely contains code to download and execute a second-stage payload. The use of eval() and String.fromCharCode() suggests attempts to obfuscate malicious actions within the script. ClamAV also flagged this as Heuristics.PDF.ObfuscatedNameObject.

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` `17e2010b0d8fa693ce49d309f86cb98c3a406925255beebcc63de7f59baf39c2`	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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