PDF malware analysis — malicious · d7c949daaf8498f5

MALICIOUS

PDF

118.6 KB

MD5: e9d77ed24a161c5bda1bcdc68b21fe1c SHA-1: 35e76bf6b28ee2dbb0d619767e2f76c695bb5551 SHA-256: d7c949daaf8498f52bc7afdacc06a386d3d23cc9c9485bab561bcb4f8fd07c17

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, flagged by multiple heuristics including 'PDF_JAVASCRIPT', 'PDF_JS', and 'PDF_EVAL'. The 'ML_NYX_PDF_MALICIOUS' classifier and ClamAV detection ('Pdf.Exploit.Agent-36086') strongly indicate malicious intent. The primary attack pattern involves exploiting a PDF vulnerability to run obfuscated JavaScript, likely to download and execute a secondary payload. The presence of a large, comment-padded JavaScript eval stager further supports this.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Large comment-padded JavaScript eval stager high PDF_JS_LARGE_COMMENT_PADDED_EVAL

PDF JavaScript contains a very large stream padded with long random-looking block comments around String.fromCharCode and eval. This is an exploit-kit obfuscation shape used to bury a decoder and recovered stage inside noise, not normal PDF form automation.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `df355ccf0496ae1f411d2dc179bdceec6ecf36bf61b956217664eca870a2831a`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627829 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 42 long base64-like blob(s).
`stream_002_off0001d8a0.bin` `ed369e2d9ea2ffee55dede95470a57e5cd60f76d5876352dfcb0b6b25744972e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D8A0	200 bytes

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