PDF malware analysis — malicious · 22de50acb425b674

MALICIOUS

PDF

7.0 KB

MD5: 906edac986f1ddd012f8e5572316c2e7 SHA-1: 4b63852bd48af73133b99601f98a37e52e7b3333 SHA-256: 22de50acb425b6742ab10c44284cc2d6f7cfe04830235d8aae69036659ebd67f

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. A critical heuristic identified the use of 'util.printf', which is associated with the CVE-2008-2992 vulnerability. This suggests the script is designed to exploit this vulnerability to achieve arbitrary code execution. The presence of an obfuscated JavaScript stream further supports this, as it is common for malware to hide its malicious actions. The script likely downloads and executes a second-stage 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` `5f5eccf384e432d6806c682031fc2bec80178daf2e7d0576aa10c6383ff94194`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19F	5780 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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