PDF malware analysis — malicious · c8fdc9ba07068ee6

MALICIOUS

PDF

6.5 KB

MD5: c189a128085fea1c70ea0b88e5f763f3 SHA-1: 1ea0650ad79b59190c1af970f0a56f15349352ad SHA-256: c8fdc9ba07068ee6c7a14ce0cdf2a086d8bac183125bcfcadc6009025166a520

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2008_2992 heuristic firing suggests exploitation of a vulnerability related to util.printf, commonly used in older PDF exploits. The ClamAV detection further supports its malicious nature. The embedded JavaScript, though not fully detailed here, is the likely mechanism for delivering a secondary payload, as suggested by the PDF_UNESCAPE heuristic and the presence of an extracted JavaScript 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` `6e830e92f50654ca377c6e37569b2aba7f32687a9c77c84d78cbd6c659b924c0`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19D	5584 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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