Malicious PDF — malware analysis report

Static analysis result for SHA-256 247f523d4adf0eea…

MALICIOUS

PDF

1.6 KB
MD5: 9b1d39641364f2d6169f62a964bf6f31 SHA-1: 51e848a0cf446216414e0cb675309e8cab018c05 SHA-256: 247f523d4adf0eea2170ef14daaa38e5e3d6dc93acbc4d4e622c609be579b598
238 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: Malicious File

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2009-0927, indicating exploitation of a known vulnerability in Adobe Reader. The embedded JavaScript, identified as 'javascript_obj0007_000.js', is likely responsible for executing the exploit. ClamAV detection further confirms its malicious nature. The primary attack vector appears to be leveraging the Collab.getIcon method to achieve arbitrary JavaScript execution.

Heuristics 7

  • Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927
    PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (matched in decompressed stream)
  • ClamAV: Pdf.Exploit.Agent-35646 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35646
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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_obj0007_000.js
2c9a2ef78b08da8af99b769800b606212dad4eb88b5c82ad13ae2efe49ea9d35
pdf-javascript-stream PDF /JS object 7 at offset 0x2B1 1778 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35646
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s).