PDF malware analysis — malicious · 8fb85c2c7c4a9e11

MALICIOUS

PDF

8.3 KB Authoring application: Juiemamaualaqohak

MD5: 3e43e2393e03b76af5f7ff1b30ed83a1 SHA-1: 66f8014f702f9ce51a92f507dacc687c6e2092cb SHA-256: 8fb85c2c7c4a9e11745ce25ff5d8de8707f89cf0ee112846bebdb6a084870e50

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscation. Critical heuristics identify exploitation of CVE-2009-0927 (Collab.getIcon) and CVE-2008-2992 (util.printf), which are known vulnerabilities in older versions of Adobe Reader. These exploits are used to execute the embedded JavaScript, which is designed to download and execute a second-stage payload. The extracted JavaScript files confirm the presence of obfuscated code and exploit-related functions.

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. (identified after JavaScript deobfuscation)
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. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-35649 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35649
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `ae59a5c61d483b926d0fff88bf610724060b2921af43a85ac8bfceff52e7a19a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x52B	6498 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `48f7a9c25b866023f2abe8fcb0dadbb108fd166c84b44ca37df3e044dea655e4`	deobfuscated-js	string-concatenation normalized Acrobat API aliases at offset 0x52B	560 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).

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