PDF malware analysis — malicious · 8c0dd0d00920f5bb

MALICIOUS

PDF

3.9 KB

MD5: 3a5f165046b8f0c409bfebf7fefd19af SHA-1: 76487bfa41ead7c72ab4d656b12cc6a586460c59 SHA-256: 8c0dd0d00920f5bb6f420970c20c6a827a5f50f6757451aed03f7ad4da2cce34

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file exhibits significant obfuscation, as indicated by multiple heuristic firings including ClamAV's 'Heuristics.PDF.ObfuscatedNameObject'. An embedded JavaScript file, 'javascript_obj0037_000.js', was extracted. This script is likely responsible for downloading and executing a second-stage payload, a common technique for initial access. The obfuscation and the presence of executable JavaScript strongly suggest malicious intent, though the specific payload could not be determined from static analysis alone.

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_obj0037_000.js` `d788cb346f61c600ba876f5c5efbb184d33c54b3113c24643e260cb34f685f48`	pdf-javascript-stream	PDF /JS object 37 at offset 0xE7	15674 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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