PDF malware analysis — malicious · b27e54bd46c40672

MALICIOUS

PDF

2.6 KB

MD5: 84fc9a737c21c104937b75eaa0e05a50 SHA-1: 551b088ce362eb22713177409ad3a20e827ccdd8 SHA-256: b27e54bd46c40672724f3127b0e1aaea748f2326d791b9b95854a91879624f50

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, which is obfuscated and uses eval() and String.fromCharCode. This indicates the script is designed to execute arbitrary code. The heuristics suggest the JavaScript is likely intended to download and execute a second-stage payload. Due to the obfuscation, the exact functionality and final payload cannot be determined with high confidence.

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_obj111611_000.js` `ec93d060eedefb16661b524c07abf69c27b21ec2d26a47b7820a409e5edc247b`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	257 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `a1cd41dc2032360401a68e3cc09bfc265e56374165425861cbbafd934b620d5b`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x267	3322 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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