PDF malware analysis — malicious · 50c975a8d7fa1540

MALICIOUS

PDF

6.5 KB

MD5: 1e88ed405a82e8592d7851c6bb12ce88 SHA-1: b01be494ac00843796cb200caf91e7ab2e997c34 SHA-256: 50c975a8d7fa154019dfd2b741e026daa8430722eaded2ae6bb0d859154e23be

226 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

The PDF sample exploits CVE-2009-0927 via the Collab.getIcon method, which is a critical vulnerability. Embedded JavaScript, heavily obfuscated using eval() and unescape() calls, is present and likely responsible for downloading and executing a second-stage payload. The reconstructed URL 'wuzSnaDI87bIytDK0cL8u7Pm3ZDb5P7/8vHzhObY1r/mrKHb85P7le6ro96poA==' is a strong indicator of this malicious activity.

Heuristics 8

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.
ClamAV: Pdf.Exploit.CVE_2009_0927-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.CVE_2009_0927-1
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `5e93a61b0ec72dfa3c32707909f3430f0892aeb0cb752ca7ee765a42fc67d7a3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x277	5753 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 13 long base64-like blob(s).
`javascript_obj0007_001.js` `bafae1360653f2a68580b0cc8245dbb010166dded1c8415d2ed195307fc4e9d3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x277	80 bytes

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