PDF malware analysis — malicious · df7e3a19a706b523

MALICIOUS

PDF

3.9 KB

MD5: 6983a26e18e827e9b9f002b51c2805d9 SHA-1: 33a364171514d866f23178d2397a50f119f91eb2 SHA-256: df7e3a19a706b523a7454b8d6b2cb4dd376f2fc77b3e6361f5f142e23d44057a

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream utilizes eval() and String.fromCharCode, suggesting an attempt to obfuscate malicious code. This obfuscated script is likely responsible for downloading and executing a secondary payload. The presence of these indicators strongly suggests a malicious intent, likely 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_obj111711_000.js` `f779d9e67a077c5e2da43933b1057669e67ca4bfc5a8e16973a5fba07544eb95`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	371 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111712_001.js` `da09cfd0af93b4797e899e346a653128889a74c8b6ac0b576df4e24561b66b16`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x247	5220 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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