PDF malware analysis — malicious · e75417dbd61674ba

MALICIOUS

PDF

4.1 KB

MD5: 696184ea0a3155bde26b9a35f76091d1 SHA-1: a08e1eac9454fcec2d4a9c7412fbe8a828b773d9 SHA-256: e75417dbd61674ba70e5a0233789c1a2647a02d81b4480a78d7d184faf66cb0f

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. The 'PDF_EVAL' and 'PDF_FROMCHARCODE' firings suggest that the JavaScript code is obfuscated and uses dynamic execution. The extracted artifacts 'acroform_b64_00.js' and 'javascript_obj0013_001.js' are likely components of this obfuscated script. The primary function of this script appears to be downloading and executing a second-stage payload, 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` `00b8be15baa81c8f779ee27c88992b01ae39b20e088ef3bbe9feae9e673f0c60`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6421 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` `943e61aa027726ec08a793823244b996f34dd49e5dee9b8de1c3456fb16328b5`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3661 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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