Malicious PDF — malware analysis report

Static analysis result for SHA-256 af468da7528ba1d6…

MALICIOUS

PDF

6.5 KB
MD5: 9efc84e5346bcd5419f019560563f4d0 SHA-1: c118ff161ff20021704bff552e5e2bfce3ff5b7e SHA-256: af468da7528ba1d62f26848f2e2d2f00ced9e6ec2b026895cd51725c65acabdb
178 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript and triggers a critical vulnerability (CVE-2008-2992) related to util.printf. This indicates the document is designed to exploit this known PDF vulnerability to execute arbitrary code. The presence of obfuscated JavaScript and a ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject' further supports a malicious intent, likely to download and execute a secondary 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.

FilenameKindSourceSize
javascript_obj0006_000.js
37fd6851f5cfccb06f64d8798bc790bb1ce28584e4e0abcd0820886c8a999311		 pdf-javascript-stream PDF /JS object 6 at offset 0x197 5580 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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