PDF malware analysis — malicious · de0a91a85ca60290

MALICIOUS

PDF

7.7 KB Created: 2009-11-20 19:44:53 Authoring application: PDF Library 5.7.8 (via PDF Library 6.4.9)

MD5: ea33e31551551b554cc239a9e971122b SHA-1: f42fe62db96835d00140084a13789a40e45ccd8e SHA-256: de0a91a85ca602900c07308bf0131f6c737cba383a5ecdde3b055cda86dc993c

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged as malicious by an ML classifier with high confidence. Static analysis detected embedded JavaScript and the use of ASCIIHexDecode filters, indicating an attempt to obfuscate malicious content. The presence of a JavaScript stream suggests the PDF is likely attempting to download and execute a second-stage payload.

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` `e4f6982a507cdea034777bb458c6ef901d80faaca8a8a5f3d6cecb69309d21b5`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37425 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long hex-escaped blob(s).

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