PDF malware analysis — malicious · 13921a00477f9530

MALICIOUS

PDF

1.6 KB

MD5: 5baacd841236aa37ded71a5d840c2bdd SHA-1: 1989344f42bf2c19b1c473546dace695701e7039 SHA-256: 13921a00477f9530bf60f7b70afab9ef4ee3bcb152328d6293e266d51ab1cbf2

208 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains JavaScript that leverages the CVE-2008-2992 vulnerability via a util.printf call. The script constructs a large memory buffer using shellcode and NOP sleds, indicating an attempt to execute arbitrary code. This pattern is commonly used to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `39a468cb82640c677208cc3752c2395ee0890191a82ea1976a226d489c7640b3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x26D	681 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `ade19c5f575a723eec94bc6073b41b7e683b52aa24416a81e6a3ff191d3bd77c`	pdf-javascript-stream	PDF /JS object 7 at offset 0x26D	46 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`combined_document_js_000.js` `1b273b4ca8bcbac98daa3a84d770ee7cdfc1d4f7009cae7e7f48a02a0ec3f992`	deobfuscated-js	combined document JavaScript streams at offset 0x26D	728 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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