PDF malware analysis — malicious · dee34efec36f55a6

MALICIOUS

PDF

4.3 KB

MD5: 9b6f7717ba5aa67b09cf2d9154b46e86 SHA-1: ceac154b3f672a5e7fef131d8d7fe0985e64c863 SHA-256: dee34efec36f55a624ca71111a709b3849e7c1f574234381176c9f933c8c6648

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript, which is obfuscated and uses eval() and String.fromCharCode(). This indicates an attempt to hide malicious code execution. The primary function of the script appears to be obfuscation, likely to download and execute a second-stage payload, though the specific payload and destination are not discernible from the provided evidence. The presence of these indicators strongly suggests a malicious intent.

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj8256_000.js` `bd48a4a4d5bb0a99ff2982bd7dbede45a30da858da4a66dfb948d7adb51f2260`	pdf-javascript-stream	PDF /JS object 8256 at offset 0x138	8286 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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