PDF malware analysis — malicious · e5e901028f319fc4

MALICIOUS

PDF

2.5 KB

MD5: 3ba584877c5fb33cb969d29859fd8e97 SHA-1: 297bac7427dc6f537ed1b937d7a1a96d1fd5be84 SHA-256: e5e901028f319fc46c6b47cde95327ccb9119b67779afe679410c39e42fa2850

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File: Malicious JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. The 'PDF_EVAL' rule firing suggests the use of eval() to execute obfuscated JavaScript. The 'PDF_FROMCHARCODE' rule also indicates string manipulation commonly used in obfuscation. These scripts are likely responsible for downloading and executing a second-stage payload. The extracted filenames 'javascript_obj111711_000.js' and 'javascript_obj111712_001.js' further support the presence of embedded scripts.

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` `c8fd62e7bccf19d586bc2c0d0bafc8a5a5fa0ec83d5b435d2d32000c92db43e8`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	2556 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111712_001.js` `156eed5a25ffb7d37ab5309ac7fb2aeae2432a4defe3f77c82c203eefdc801cf`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x7DE	540 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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