PDF malware analysis — malicious · 094585c80fc512f7

MALICIOUS

PDF

5.7 KB

MD5: a8706ab4cafd7c0fc570391630075d4e SHA-1: bd39a7c71064584691e3b03a0d9615ab9e44fd1f SHA-256: 094585c80fc512f75cb88f3f66f7ab74b26e5f45128dca7f8a828c13c97be717

268 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that utilizes the unescape() function and a call to util.printf, indicating exploitation of CVE-2008-2992. This JavaScript is designed to download and execute a secondary payload, a common technique for initial access and further infection. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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. (matched in decompressed stream)
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.
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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_obj0006_000.js` `f1b10127a401090aaef255be87137dd9a0905188620001a765757e5d566ccf99`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A3	4736 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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