PDF / .PHP malware analysis — malicious · 287e6dbc5eabab23

MALICIOUS

PDF / .PHP

55.6 KB Created: 2009-02-26 09:41:45 Authoring application: NY2S0 (via f0RCcZgXbZVmE)

MD5: 615991c4c234a2537b963daabe2a7b98 SHA-1: f043ad1cdd2bcc4134f23778947efaa5b0fe73f7 SHA-256: 287e6dbc5eabab233864356fc6cf94136606811b70f7ee47961cd189c01bf551

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF document contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The JavaScript stream is heavily obfuscated and utilizes String.fromCharCode and eval() calls, suggesting an attempt to download and execute a second-stage payload. The specific obfuscation techniques and the use of eval() are common in malicious PDF documents designed to exploit vulnerabilities or deliver further malware. No specific family could be identified due to the heavy obfuscation.

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.
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_obj0007_000.js` `cf759cfaec0c360406e968124555d394167920f4814aee02950e5aae159cef09`	pdf-javascript-stream	PDF /JS object 7 at offset 0x246	55650 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 8 long base64-like blob(s).

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