PDF malware analysis — malicious · e00ca7c30b0da141

MALICIOUS

PDF

1.6 KB

MD5: 15c13f86c21c82bd78a3b2fa266c881b SHA-1: c726044d8f030ddc49d51e561fc56bc9ccc0581f SHA-256: e00ca7c30b0da14189abc0673d14154ac380905370cb55ff2cc40bba65e12850

106 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1105 Ingress Tool Transfer

This PDF file contains embedded JavaScript that attempts to save and execute a malicious HTA file named 'PlSL.hta' in the Windows Temp directory. The script uses 'Microsoft.XMLHTTP' and 'ADODB.Stream' objects to download the payload from 'http://10.0.0.98:8080/PlSL.exe' and 'wscript.shell' to execute it. The ML classifier strongly indicates maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
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.
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://10.0.0.98:8080/PlSL.exe

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `e4b04380161df1e87d5e7fbdbd57f5377ecc6d668c0dba0670b76d7ad1584bd5`	pdf-javascript-stream	PDF /JS object 1 at offset 0x435	181 bytes
`javascript_obj0001_001.js` `7b0a665b48179c25d142a4f8a73572730bed2175d0477a8c63dd8318a0d0aa91`	pdf-javascript-stream	PDF /JS object 1 at offset 0x435	84 bytes
`embedded_pdf_script_000002a9.bin` `acfa17c3aa16cd3624105cd58e6178025f9fdb5a5c72a436e2ebf0bb2c3ae617`	pdf-embedded-script	PDF raw stream script payload at offset 0x2A9	956 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved artifact contains 1 eval/decoder/string-building token(s).

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