PDF malware analysis — malicious · bf2a7e2627eed015

MALICIOUS

PDF

23.2 KB Created: 2011-04-04 16:16:20 Authoring application: Adobe InDesign CS2 (4.2.2) (via XV+*XStOH~I+LrinCI@MX*Dg.OH~I+LfXV+*XromCI@MX*DCharCOH~I+LodeXV+*X)

MD5: 1393b971f8933e8d7bf3c3669f34949a SHA-1: f6d04370f52f3c4ba861c202ea1c45a0409a0cc4 SHA-256: bf2a7e2627eed0153bedd4e3bc4256879655e19c65039b4bbfe96d4accc3c5b2

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, which is flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL due to the presence of an eval() call. The ML classifier also strongly indicates maliciousness. The embedded JavaScript file, javascript_obj0001_000.js, is likely responsible for executing the malicious payload, though its specific actions are obfuscated. The file's metadata indicates it was authored using Adobe InDesign.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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_obj0001_000.js` `268dd406ffa0d26ea04a15659fe985111f30c2e536693bfc55de245180a394b0`	pdf-javascript-stream	PDF /JS object 1 at offset 0x23	1291 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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