PDF malware analysis — malicious · f99e310a825eabae

MALICIOUS

PDF

3.9 KB

MD5: 4690760d652bb5b7d06e52e055091671 SHA-1: ff49294662111593af0d59b7009811099a74959b SHA-256: f99e310a825eabaebcb518764947fa051571bac5d04b7b6c694cfe89cf1ceb06

184 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains embedded JavaScript that utilizes `eval()` and `String.fromCharCode()` to deobfuscate and execute code. The critical finding of CVE_2014_0496 indicates the exploitation of a vulnerability related to `app.addToolButton/removeToolButton` functions, commonly used to achieve arbitrary JavaScript execution. The embedded JavaScript streams, particularly `numeric_charcode_stage_000.js`, are heavily obfuscated but the presence of `eval()` and `String.fromCharCode()` strongly suggests the download and execution of a secondary payload. The lack of readable document body text prevents a more specific determination of the lure, but the technical indicators point to a malicious PDF designed for exploitation.

Heuristics 7

app.addToolButton/removeToolButton — CVE-2014-0496 critical CVE exact CVE_2014_0496

PDF JavaScript combines app.addToolButton() and app.removeToolButton() with heap-spray shellcode markers — the public Adobe Reader/Acrobat ToolButton use-after-free exploit shape for CVE-2014-0496. (identified after JavaScript deobfuscation)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Suspicious extracted artifact high 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.
String.fromCharCode medium PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically (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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `2d592a34b8a5339576d966bf410bda49c78309f1d3a18e3f9121a06b645dc9bd`	pdf-javascript-stream	PDF /JS object 6 at offset 0x224	19526 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_000_off0000012f.bin` `69d0d0114b03e3f7748b6bbd5809c83dc8d156e20d1bfcdf9d5925fb9a502f54`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x12F	372 bytes
`numeric_charcode_stage_000.js` `f89321f8b9059c8e7588b858198e317c23577561eb05f20e0908f29f4599a7dc`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x232	5778 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 15 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.