PDF malware analysis — malicious · 57719a58eb7a9569

MALICIOUS

PDF

3.5 KB

MD5: 3c206bf3104abd7b9ed7934f68ee1043 SHA-1: 52e661059e7d177c1fe1909bbef395f758b39f17 SHA-256: 57719a58eb7a9569c23e80a526af404a59ed13bcf570619219b0e418b956ea83

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, which is obfuscated and utilizes the unescape() function. A critical heuristic identified the CVE-2008-2992 exploit (util.printf), indicating a known vulnerability is being leveraged. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, though its exact function is obscured. The ClamAV detection further supports the malicious nature of the file.

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` `55062fca249694f1e42a35e0fa87e863ed53583d531c9b84390697c404246b47`	pdf-javascript-stream	PDF /JS object 6 at offset 0x199	2325 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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