PDF malware analysis — malicious · ffbc76b9ca96bd6b

MALICIOUS

PDF

6.9 KB

MD5: b2c04b95982a6589d6b576d1139b7a29 SHA-1: c1f65dc6502506a01f46215cd2f510a9385250d0 SHA-256: ffbc76b9ca96bd6ba880f582cccb6e98ce9e1286348ccea58eb5b3b248d6bd46

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 known PDF vulnerability. The embedded JavaScript stream, named 'javascript_obj0006_000.js', is likely responsible for downloading and executing a secondary payload. 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` `60ea2372610708b9b55f3be7591ee0b581a7f75244e9280003bd1cf9ec023ca6`	pdf-javascript-stream	PDF /JS object 6 at offset 0x18F	5813 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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