PDF malware analysis — malicious · bb03026d9b319c24

MALICIOUS

PDF

2.3 KB

MD5: 4481da5999beeb9bf3957e46ff0ea9cf SHA-1: ea73bf1628ef5123df18165458646ab8f6e4edda SHA-256: bb03026d9b319c24a91b5f68d898efa24264049a2b67d1133969b25b97cd7a74

226 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1071.001 Web Protocols

The PDF file contains embedded JavaScript that utilizes `eval()` and `unescape()` functions, indicating obfuscation. Critical heuristics identify the CVE-2009-0927 exploit, specifically targeting the `Collab.getIcon` method. This exploit is designed to execute arbitrary JavaScript, which in this case is likely used to download and execute a secondary payload. The presence of deobfuscated JavaScript further supports this analysis.

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)
ClamAV: Pdf.Exploit.Agent-36098 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36098
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.
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. (matched inside decoded stream)
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_obj111611_000.js` `e1ab3bbf30605cecdce6db9d2556198626dbb178f7a4cb471a9436bb6e8bd92f`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x801	462 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `8cf4310ffe87aa015ce5997e5416d3e5d1401f485c7f71a5dbf90d39f1fb1f9f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x189	2643 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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