PDF malware analysis — malicious · 1c1ea7e8e388cdb0

MALICIOUS

PDF

6.5 KB

MD5: 94d51712832739865a72216ed0b212f0 SHA-1: a1781db9747370a9e32371f1addc8a471952f34d SHA-256: 1c1ea7e8e388cdb07223c5224f37bddf41a6e320e09d85c230d654523b84a61b

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. A critical heuristic identified the use of util.printf, which is associated with CVE-2008-2992, a known vulnerability in Adobe Reader. The embedded JavaScript stream, identified as javascript_obj0006_000.js, likely contains obfuscated code designed to exploit this vulnerability. The primary intent appears to be the execution of arbitrary code, potentially leading to the download and execution of a second-stage 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` `72f0bd608e92c6910b2a9d259dd236efde65172109bb47a10f7c50313e0d07e5`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A1	5543 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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