PDF malware analysis — malicious · 4ed94ca31b2c06be

MALICIOUS

PDF

4.0 KB

MD5: 08201a4992823a62064a4217ecf8db70 SHA-1: 4980dadbaa1a240e70ff783ae766fdc427acbb8a SHA-256: 4ed94ca31b2c06bee63ce86fc33751acafebebceadbb99f35c32fad392de5df8

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and String.fromCharCode suggests the JavaScript is obfuscated and likely executes arbitrary code. The extracted JavaScript files, 'acroform_b64_00.js' and 'javascript_obj0013_001.js', are suspicious artifacts. The primary attack pattern involves leveraging these embedded scripts to achieve malicious objectives, such as downloading and executing additional payloads.

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` `ce86c362091a5075c4558e1a8d8be0f4f129e979e529da9dc0ae87f78f10b3bb`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6285 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` `9f1cdea8552683f24fc118313e4d454850eddd16d62cb862c56777403b22fcb6`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3560 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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