PDF malware analysis — malicious · a05b783605abc86e

MALICIOUS

PDF

6.8 KB

MD5: 50f06a8fedea16a65964076e2bdfd848 SHA-1: e1fb8b668ad59a45ae09e126dcbf1a4f3ceafea8 SHA-256: a05b783605abc86ed2d5e48750d7e0b88fe95f9c45e7746d0b96217c3a3e1767

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 presence of a CVE-2008-2992 exploit (util.printf) and the use of unescape() suggest the JavaScript is obfuscated and intended to be executed. A suspicious JavaScript file was extracted, further supporting the malicious nature of the PDF. The exact intent of the script is unclear due to obfuscation, but it is likely to download and execute 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` `358e1b75c83292d3b96328130b0a5efb01209b042e4cf8c5068dd331be055db0`	pdf-javascript-stream	PDF /JS object 6 at offset 0x199	5677 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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