PDF malware analysis — malicious · 70674708dcc33dab

MALICIOUS

PDF

19.4 KB Authoring application: Rohominosxagalo (via Whaxomojitevese)

MD5: 4be28917a6b88091db99c512bd055636 SHA-1: 3da48705c8302c76306030f8ae578ce37ebe2276 SHA-256: 70674708dcc33dab7e366ecb8e5f942eca7083a5483ca4420e270ef40f398cfb

148 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains obfuscated JavaScript that, when executed, uses unescape() to decode a string. The script appears to be designed to exploit a PDF viewer vulnerability, leading to the execution of arbitrary code. The ML classifier strongly indicates maliciousness, and the presence of JavaScript exploit indicators further supports this. The script's primary function is to decode and display a string, likely a lure or further instruction, after exploiting the viewer.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

Heuristics 5

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.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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_obj0032_000.js` `cb29e0515bf7b3a9211815d897cb5db6908441d9632eaa6f927ec4ce842793fd`	pdf-javascript-stream	PDF /JS object 32 at offset 0x471F	1423 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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