PDF malware analysis — malicious · 8f5a2cb20516c64d

MALICIOUS

PDF

8.4 KB

MD5: 0eb64a1d7657b0f1f8ff27211f3f585b SHA-1: bea5ba77d13e794e5ef773e0b6f5f2f6e3e5fcfc SHA-256: 8f5a2cb20516c64d1373c68e5a178f79670cce1373caa9dcb6c63731b06099fa

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, which is obfuscated and utilizes the unescape() function. Heuristics indicate a critical vulnerability, CVE-2009-0927 (Collab.getIcon), which is likely leveraged by the JavaScript to execute malicious code. The ClamAV detection further supports the malicious nature of the file. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

Heuristics 6

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: 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.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `1ab2315211dda4fc34ead3802643bf6766b80dc275d0ed0b086fe3c4e7ad95fa`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A7	5956 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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