PDF malware analysis — malicious · ec7ff25ffcd0c3d0

MALICIOUS

PDF

7.7 KB Created: 2009-11-05 19:44:20 Authoring application: PDF Library 9.9.1 (via PDF Library 2.1.10)

MD5: faf133aa9a5b9602c3a42d8781c2169f SHA-1: 83ae9a1cb3e10c15452fe165e5f156906012d7c3 SHA-256: ec7ff25ffcd0c3d0de8f4bf333b7d38c8864462dbd42a1ce3b6589c1b6cd33be

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by an ML classifier and contains embedded JavaScript. The JavaScript stream, named 'javascript_obj0007_000.js', is suspicious and likely used to download and execute a second-stage payload. The presence of ASCIIHexDecode filters with exploit indicators further supports the malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `634cb5be581e471a89696fb500879b3c417497409f529fd571304bc8b1d56f71`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37233 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long hex-escaped blob(s).

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