PDF malware analysis — malicious · 4eaf49b0df80e344

MALICIOUS

PDF

68.8 KB Created: 2010-03-13 07:18:30 Authoring application: JOgoB2 (via T7lhHJwkgazTY)

MD5: 7b394be54abcd416ff38178621c59caa SHA-1: 0e5f8aea97a22034e655ca8be47fb92f16be8970 SHA-256: 4eaf49b0df80e3441965311eadaee61e7f6b694fb9d1e118af539c95965be195

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream is heavily obfuscated, utilizing `eval()` and `String.fromCharCode()`, which are common techniques to hide malicious code. The primary heuristic firing is `PDF_EVAL() call`, suggesting the script is designed to execute arbitrary code. While the exact payload is obscured, the presence of obfuscated JavaScript points to a malicious intent, likely to download and execute a secondary payload or exploit a vulnerability.

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` `1c4cbf576fded27f87a21988f70728ff3da038c9e03d0a7baf52bdb700fd0315`	pdf-javascript-stream	PDF /JS object 7 at offset 0x235	69235 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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