PDF malware analysis — malicious · ea00a7cfe008dbd7

MALICIOUS

PDF

4.0 KB

MD5: b9327a741d902bd4f534d512a57f3667 SHA-1: a20df12d6ddbbe603a42f14800eeea628bebf132 SHA-256: ea00a7cfe008dbd76489cbaed85f41b31099e20ed7b8f43edb856b47de95df4f

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The presence of eval() and String.fromCharCode suggests code obfuscation and dynamic execution. The extracted JavaScript files, 'acroform_b64_00.js' and 'javascript_obj0013_001.js', are suspicious artifacts. The primary intent appears to be the execution of obfuscated JavaScript, likely to download and execute a secondary payload, which is a common technique for malware delivery.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `7ec3c6d66d29b48ac11fa0ecf3746a2d0ce9be7e3c7e8173e326009c7b8e0c28`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6293 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `ffbbe50156d237e9177747bc0938f186f43469681e0672a8a65ba2a3a9cd44d3`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3565 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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