PDF malware analysis — malicious · d9c043a2ace47e52

MALICIOUS

PDF

2.3 KB

MD5: 7ca5a084a028be1294701c199d375351 SHA-1: e603af17b08b83c79f1fc7cb0f95966d4a8ed092 SHA-256: d9c043a2ace47e5228b5bc6ed4ae3ece70cf556faf797eda832bf900a1fe956d

66 Risk Score

Malware Insights

MITRE ATT&CK

T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream utilizes eval() and String.fromCharCode, suggesting obfuscation and dynamic code execution. The extracted artifact 'javascript_obj0005_000.js' likely contains the malicious payload. The primary attack pattern involves leveraging JavaScript within a PDF to execute arbitrary code, likely for further exploitation or malware 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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `b8296e0956899d52ec4cbe88e0e624bdc47fd2340f39d1d876b06d8ebe2d81b5`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	8324 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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