PDF malware analysis — malicious · c574dbaf6af95c85

MALICIOUS

PDF

5.7 KB Created: 2008-12-17 23:30:58 UTC

MD5: 81782083ab2fd69e16e1006b37530b66 SHA-1: 2794e0dc1f9dc1fa60db08f29d51928dce919030 SHA-256: c574dbaf6af95c85519dafc15d489cd564b7477d4f9ce70911787616e8be9e2b

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The presence of a large, encoded JavaScript blob suggests it's designed to obfuscate its true functionality. This script is likely responsible for downloading and executing a second-stage payload, as evidenced by the suspicious extracted artifact 'javascript_obj0006_000.js'. The confidence is moderate due to the obfuscated nature of the script, preventing a definitive analysis of its exact actions.

Heuristics 5

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_obj0006_000.js` `73b5d7aa915d109608f8eb548d282e6437308cbc39e0fbd9732a9db2a0710404`	pdf-javascript-stream	PDF /JS object 6 at offset 0xB5	12382 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 7 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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