PDF / .PHP malware analysis — malicious · a89e88d8aa1c83a4

MALICIOUS

PDF / .PHP

5.7 KB Created: 2008-12-17 23:30:58 UTC

MD5: ccbd37b3c957f186b5a926229d6dc0e5 SHA-1: 8de5125dc603cb1309e5523167a85affc018a64f SHA-256: a89e88d8aa1c83a4fb4591abda77a0e223c4c9404823aed7298b4b0f703d26de

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The presence of an eval() call and String.fromCharCode() within the decoded stream suggests the script is obfuscated and likely designed to download and execute a second-stage payload. No specific family could be identified from the available evidence.

Heuristics 5

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` `5b43b7aa403dd0798f393a355f804ecc1e73d295c437e1194b04fd8041c8b6bc`	pdf-javascript-stream	PDF /JS object 6 at offset 0xB5	12303 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 7 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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