PDF / .VXE malware analysis — malicious · 8a517bd3f947baaa

MALICIOUS

PDF / .VXE

12.8 KB

MD5: ad25b8dd8eac67d9e1e57f4510a05b0a SHA-1: 501a0178fbbd96c05bc702fb970ae5ff84bc875d SHA-256: 8a517bd3f947baaa1f56501912de39a3135babed0a8c05f142ca3c99e6fad264

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, as indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The presence of `eval()` and `String.fromCharCode` suggests obfuscated JavaScript code designed to exploit a vulnerability within the PDF reader. The ClamAV detection of 'Pdf.Exploit.Agent-36086' strongly suggests this is a known exploit. The extracted JavaScript file, 'javascript_obj0006_000.js', is large and exhibits obfuscation, further supporting the conclusion that it contains malicious code intended to download and execute a second-stage payload.

Heuristics 6

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)
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `e5ad6920293801f15df30ef1c19eafe13e0d2a18c881ae8b0a23baf74bfb9419`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	644711 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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