PDF malware analysis — malicious · 90829d33b29d9d26

MALICIOUS

PDF

6.5 KB

MD5: 301832ba3fae7df1e16ba43178540b6e SHA-1: ccdeeace5507367354423ea9499dda460cdd994a SHA-256: 90829d33b29d9d2613feb3568bb0a618b7d7f53c1b64b55c69cdd85cbb64c8aa

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, which is obfuscated and uses the unescape() function. A critical heuristic indicates exploitation of CVE-2008-2992 via a util.printf call within the JavaScript. This suggests the primary goal is to leverage this vulnerability to execute arbitrary code, likely to download and run a second-stage malicious payload.

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. (matched in decompressed stream)
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` `14dc8f81ff6bc8dcf91ddd600f47f954c62e380cb49b9ae9919f17b19a6aa5be`	pdf-javascript-stream	PDF /JS object 6 at offset 0x18D	5381 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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