PDF malware analysis — malicious · e6bb1e40d4bb4e4a

MALICIOUS

PDF

2.8 KB

MD5: 35a0e511ae2052f5d78443a6c1606106 SHA-1: f1fa9b7ab4557cce451c463975292b96c78a81c2 SHA-256: e6bb1e40d4bb4e4a2c2a1c1840c9b389f399e8167e94c6ffa94947a41dedf3f0

238 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that is obfuscated using unescape(). Heuristics indicate the exploitation of CVE-2009-4324 via the media.newPlayer object, which is a known vulnerability in Adobe Reader. ClamAV detections confirm the presence of JavaScript exploit shellcode. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

Heuristics 7

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (matched in decompressed stream)
ClamAV: Js.Exploit.Shellcode-18 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Js.Exploit.Shellcode-18
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.

Filename	Kind	Source	Size
`javascript_obj0008_001.js` `09539c9f65da6f8df98b14fea8442638d68ee30062edb11cb678f8c4ccd9456b`	pdf-javascript-stream	PDF /JS object 8 at offset 0x193	5877 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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