PDF malware analysis — malicious · d41ba520ed068671

MALICIOUS

PDF

6.8 KB

MD5: e531f5e697a95102fafb4ab3717ca830 SHA-1: 93421ed7553caf54cc54e7d85373e3e2f1d3b7cf SHA-256: d41ba520ed068671f7f56d04ea33692e521a522cabf6f0ad85dac3ecec9b7817

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of the CVE-2008-2992 heuristic, specifically mentioning util.printf, strongly suggests exploitation of this known PDF vulnerability. The embedded JavaScript stream was likely used to decode and execute malicious code, potentially downloading a second-stage payload. The ClamAV detection further confirms its malicious nature.

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` `14b23234c7f708d59830fef6e3e666f59806962bd0f625fcfe1de7b3335d3e95`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A3	5763 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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