PDF malware analysis — malicious · bca62a068c44fd1d

MALICIOUS

PDF

11.2 KB Created: 2011-03-31 18:18:40 Authoring application: WC~OStW[@U*IrinGB*Wg.W[@U*IfWC~OromGB*WCharCW[@U*IodeWC~O

MD5: a5fccd9108163ff79c4574c92feab994 SHA-1: bc096b0ccec3623a571089a9ce6454e8960c8027 SHA-256: bca62a068c44fd1d10607d75fd7db32f90259a082b5e6c2f7f0cbb92c75a4b6c

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

This PDF file was flagged as malicious by an ML classifier and contains embedded JavaScript. The JavaScript stream includes an eval() call, indicating obfuscated code execution. This pattern is commonly used to download and execute further stages of malware. The specific JavaScript content is too obfuscated to determine the exact payload or persistence mechanism.

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` `808a3127b31c5dfa7891cfe3b0848042a1a0ac417c5a3fda8a3f581dabfde7da`	pdf-javascript-stream	PDF /JS object 1 at offset 0x23	1247 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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