PDF malware analysis — malicious · 3d40c1124861fac8

MALICIOUS

PDF

22.6 KB

MD5: 38a0901e1b2129036c03901ff515f4c9 SHA-1: 3d8577b2e89e32ff85371f24e303bc4dea66a911 SHA-256: 3d40c1124861fac866fd868356fe3284d23f55c9a13749cea4d8c7cf3e422fed

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript that leverages the CVE-2009-0927 vulnerability through the `collab.getIcon()` method. The script uses `eval()` and `unescape()` functions to deobfuscate and execute further stages, likely downloading and running additional malicious content. The presence of multiple JavaScript streams and deobfuscated JS files indicates a multi-stage attack. The reconstructed string literals within the script, such as 'mbo20zl6qx0|ox1R7|Tf1Ge14SdC7|dP913mp05O2M', are part of the obfuscation mechanism.

Heuristics 5

Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `af1070d1b6ce38c41bf4d2e286b693bdecd6979a609fe4ed4fdbea6809a70ef9`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3745 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111712_001.js` `73087dc85628fa11071f9caa968874f00641ee339a2623b2121e9f77c5d2486e`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x1065	17012 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111713_002.js` `986b156ae0753e70203202a0b712e2433d05bff80f18a5ecd316586dd61fb106`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x530F	1778 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `f89df567ac1524aa97d7d1c2e318640fc4fa1525d608905c9904da2f1b756863`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1065	1520 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `407624ceb11bdfcccd03817d5cc6229f3a3f8dfc15051e1567d07f2b81bcede8`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x530F	100 bytes
`legacy_pdfkit_stage_002.js` `552e39cb958c83ee1b8aa47e4854eec96a5204f4dcbd786038d7e44ead890b03`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x1065	1621 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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