PDF malware analysis — malicious · e28e045673be957a

MALICIOUS

PDF

28.5 KB Created: 2010-03-12 09:18:54 Authoring application: ccRfcoTMJHGo (via mqhzp9HwUYBGJ)

MD5: 7be4f72796550b0757ab6fd72281e3f4 SHA-1: 524230714dcd880167e10867135960f7923daa61 SHA-256: e28e045673be957af7aa21f185f9656ac7765cf912808550e68130fd12ef3995

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 JavaScript stream, identified as 'javascript_obj0007_000.js', is obfuscated and uses String.fromCharCode and eval() calls, suggesting it's designed to download and execute a second-stage payload. The high confidence in the PDF_EVAL heuristic and the presence of obfuscated JavaScript point to a malicious intent, likely to compromise the user's system.

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` `d2506a8811ada3061eab5070cda2be60ad86b29f3423e5aba492c25d06ebe6f4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x248	27988 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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