PDF malware analysis — malicious · c0d60fb22e18264e

MALICIOUS

PDF

4.3 KB

MD5: d5dcfb234258de141fb0392808d0b669 SHA-1: 550c0c010240747011db7a301a7e02f7fa187045 SHA-256: c0d60fb22e18264e995cc806a4a696e49ef149b08da3552a55ecb4c7e2bd61d4

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream includes an eval() call and uses String.fromCharCode, suggesting obfuscation. The primary heuristic, PDF_EVAL, strongly suggests that the script is designed to execute arbitrary code. The extracted artifact 'javascript_obj365428_000.js' is likely the deobfuscated payload. This payload is likely responsible for downloading and executing a second-stage payload, a common technique for initial access.

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_obj365428_000.js` `ec65af5afc37fe1540150428ec5b423a778e983d4bff04d2a7c0295cf29b12e1`	pdf-javascript-stream	PDF /JS object 365428 at offset 0x13A	8292 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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