PDF malware analysis — malicious · 40f16f2072153680

MALICIOUS

PDF

6.5 KB

MD5: facde57a3b5b78830e913e391ffd2a87 SHA-1: 63273ec3ca6799f5862cefa68783573b81052749 SHA-256: 40f16f2072153680c5e656611246609d10118caec063dbd36b43f8c8a688a008

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a critical CVE_2008_2992 firing suggests the exploitation of a known vulnerability within the PDF reader to execute this script. The script is obfuscated, as noted by PDF_UNESCAPE and ClamAV's Heuristics.PDF.ObfuscatedNameObject detection, and likely serves to download and execute a secondary payload. The embedded URL heuristic further supports the delivery of malicious content.

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` `1a03b64783340c0455c526772a3668afce0c94ab0b6c958f1e33f8e78ade9e26`	pdf-javascript-stream	PDF /JS object 6 at offset 0x18B	5518 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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