PDF malware analysis — malicious · aa7fe6440fd8f27b

MALICIOUS

PDF

3.3 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe (via Notepad)

MD5: f51653b99a3037aa715799687056cf49 SHA-1: 0e2c59025d1f2a4298a74e7869539872f61061b9 SHA-256: aa7fe6440fd8f27b2954d10db2df5896c1cedd282e79539260e33bcffba04457

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages two critical vulnerabilities, CVE-2009-0927 and CVE-2007-5659, to achieve code execution. The embedded JavaScript is obfuscated using eval() and unescape() and is detected by ClamAV as Js.Exploit.Shellcode-18. This indicates the script is designed to download and execute a secondary malicious payload.

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)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
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.
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_obj0006_000.js` `29fab702bc678d5a5e952318f1e3f64700325c39385e47482ae432b32f55b5f8`	pdf-javascript-stream	PDF /JS object 6 at offset 0xA42	232 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `d77e69368c6189597fde01d46c4f8bd9cd35900382106c2150145ccc41a2d339`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x18B	4807 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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