Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff39674edbc5aec…

MALICIOUS

PDF

6.2 KB
MD5: f61e30e769993b8b577ee2573dd4f929 SHA-1: 5871ec0ab8782fe66013d0541cdc018f5d55f395 SHA-256: 1ff39674edbc5aec2c3fd82bc3e2edad3072b04c6e35ea6cc1b9690f28324f88
178 Risk Score

Malware Insights

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

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 flaw to run arbitrary code. The presence of JavaScript and the ClamAV detection for obfuscated objects strongly suggest the execution of a malicious script, likely a downloader for further stages. No document body text was available for analysis, but the technical indicators point to a exploit-based delivery mechanism.

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
96fe2c99ca5848725a2f638a27633edd94889e763710f54151bd7856f3b81e47		 pdf-javascript-stream PDF /JS object 6 at offset 0x1A5 5186 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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