PDF malware analysis — malicious · e2e847664a8b5f7e

MALICIOUS

PDF

4.1 KB

MD5: edd4c944a1ba218cd8174f28e494886b SHA-1: 89bffee4ffb9c13e5d8c8464fd7a544c5ef78e5e SHA-256: e2e847664a8b5f7e02830360ecbfcbe6e33ab2ac65f3ec30be96d2938ce4b4c8

140 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains XFA forms and embedded JavaScript, triggering multiple high-severity heuristics related to PDF exploits and script execution. The embedded JavaScript, identified as 'stream_000_off0000027f.js', is highly suspicious and likely responsible for downloading and executing a secondary payload. The ML classifier strongly indicates maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_000_off0000027f.js` `b5eabc7e1e410665d0afdb3e1503ce51c5c765b7182d472c73995dd4ea32c481`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x27F	10329 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

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