Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e8011a7964edfc…

MALICIOUS

PDF

6.3 KB
MD5: 2e3a1e92b74c547a7dadc1d66586f5c8 SHA-1: 35fe48c78bbf940f2a05020e00060062e6888da9 SHA-256: 94e8011a7964edfce1dfabff81912e29b552263b77f18618600d0f56899117fc
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 critical CVE_2008_2992 heuristic firing suggests exploitation of a vulnerability related to util.printf. The ClamAV detection of 'Pdf.Dropper.Agent-7284032-0' further confirms its malicious nature. The embedded JavaScript stream, identified as 'javascript_obj0006_000.js', is likely responsible for downloading and executing a secondary payload, a common technique for dropper malware.

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: Pdf.Dropper.Agent-7284032-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7284032-0
  • 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
7199b83ddc805f60cd5dfe5db02112f1d720ac668c7f266c4324035b9a281371
pdf-javascript-stream PDF /JS object 6 at offset 0x1A3 5487 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).