PDF malware analysis — malicious · 57a5c07ca70e3ee2

MALICIOUS

PDF

146.0 KB

MD5: 13a86f2e02f7cc5ec9929a9ca578ae61 SHA-1: 49a7b5939b035dd39fa2dd77b5639282d025eac8 SHA-256: 57a5c07ca70e3ee2cfb60aac0659c685bb5efccd545f129a2f35a8d68dc2b785

176 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The PDF_UNESCAPE and PDF_FILTER_HEX heuristics suggest obfuscation and potential exploit activity. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript streams, javascript_obj0013_000.js and javascript_obj0013_001.js, are likely responsible for downloading and executing a secondary payload, although their exact functionality is obscured. The presence of unknown reputation URLs further supports a malicious delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 8

ClamAV: Pdf.Exploit.Agent-36189 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36189
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.bitstream.com
- http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xci/2.6/
- http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `1d11f9929d7479f653118094c94f12103057ba33eb13937b69b81f30cd70173a`	pdf-javascript-stream	PDF /JS object 13 at offset 0x10531	27221 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0013_001.js` `d6d00905f3f2a8a68390978b50dda931f38c13336a24e07b06ca38a50507e456`	pdf-javascript-stream	PDF /JS object 13 at offset 0x1056D	27229 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`font_00_sfnt_off00000352.bin` `a8f4d9b7d604c3c8a0bf3f9a31b9e952d467f98d118fdc784d95d689a14d8a33`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x352	65932 bytes

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