PDF malware analysis — malicious · 6d5e2364401b33ba

MALICIOUS

PDF

2.1 KB

MD5: 0410c4c72fba86dc2157fe637f32a13e SHA-1: 70c34ce2f37257388e0ff799435a682cdfc2658f SHA-256: 6d5e2364401b33baba057e623b40e36b52f6e584baeb92ca188b2b619c011ab2

266 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF contains obfuscated JavaScript that utilizes eval() and unescape() functions, indicating an attempt to exploit a client-side vulnerability. The embedded JavaScript is designed to download and execute a second-stage payload, as suggested by the PDF JavaScript exploit cluster heuristic and ClamAV detection. The obfuscated string within the script likely decodes to a URL or executable payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Exploit.Agent-6052 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-6052
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `f4b21fd901c191756cbd71881aa0bb3c457849ac073e8ecafd941233343ed327`	pdf-javascript-stream	PDF /JS object 9 at offset 0xEF	7258 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).

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