PDF malware analysis — malicious · e7f04cc0870fb53f

MALICIOUS

PDF

4.0 KB

MD5: 87c511584583baa1984c46fea611233b SHA-1: ac11ee9f74fe805754cd6c8e4ae082812c96f405 SHA-256: e7f04cc0870fb53f35f24ef0b16cf290962ab1ec7b4b98363a352ef23e9f5110

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream utilizes eval() and String.fromCharCode, suggesting obfuscation and dynamic code execution. The deobfuscated JavaScript file 'acroform_b64_00.js' likely contains the core malicious logic, potentially downloading and executing a second-stage payload. The presence of these elements strongly suggests a malicious PDF designed for payload 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_obj0013_001.js` `3514fcffb86ef99866b2b21004188121667d3d71cd981a22e2fb81207d3a30d1`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6341 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` `ddfc39636e6e05bfcb8e78916387f35fc11407a634ef777478f66bdb8e1df051`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3601 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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