PDF malware analysis — malicious · 7cffedd91302546d

MALICIOUS

PDF

8.0 KB

MD5: 6d4f03ce3f0cc25cdca09a9a1944c42e SHA-1: 5225ea0152006e864c396e15dae684dd8cb5ef17 SHA-256: 7cffedd91302546d5464e47fa03d80ad0b9183199c0c5b31d66aa74afa6e83f2

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The `eval()` call and `String.fromCharCode` usage suggest obfuscated code designed to execute arbitrary commands. The extracted JavaScript files, particularly `legacy_pdfkit_stage_000.js`, are likely responsible for downloading and executing a secondary payload. The document body is unreadable, but the presence of obfuscated JavaScript points to a malicious intent to compromise the user's system.

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_obj0004_000.js` `f7683d1b42975f0c101029c8db451de61589af3a69ce8d458c76860d5321436a`	pdf-javascript-stream	PDF /JS object 4 at offset 0xE1	309 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `8e95a6b824be5f74faa58cd1e04dce266ee8fef91fbbd6f35dfabf364193c87b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1ACC	1628 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.