PDF malware analysis — malicious · 593a81544fb21b5a

MALICIOUS

PDF

6.8 KB

MD5: 8134ad74abfada1a59444cd66e267298 SHA-1: 163dc91471111367459fe4582a9ce1daf741168e SHA-256: 593a81544fb21b5a967e605be701d0747182930fe7bc556d8e0b18c46b8a1013

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2008_2992 heuristic firing points to the exploitation of a specific vulnerability within the PDF structure. The unescape() call further suggests obfuscation of malicious code. While the exact payload is not clear from the static analysis, the combination of these factors strongly suggests the file is designed to exploit this vulnerability to deliver a secondary malicious 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` `3e11baefbb2aba246de006ac474ef95e4a6aef6614a63a36cca33788475087a7`	pdf-javascript-stream	PDF /JS object 6 at offset 0x19D	5672 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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