PDF malware analysis — malicious · 92fdf301d03468ef

MALICIOUS

PDF

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

MD5: 57f8040b60c19c2edce3bb789ca04589 SHA-1: 5d61bbb09e3a1f3d51e3f5782d678cc27daf5638 SHA-256: 92fdf301d03468efa5f5b3d8016013ab3ce63f1e17fa98f96eded4e747c4d36c

238 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript that leverages critical vulnerabilities CVE-2009-0927 (Collab.getIcon) and CVE-2007-5659 (Collab.collectEmailInfo). The JavaScript is obfuscated and uses eval() to execute, indicating it's designed to download and run a secondary payload. Static triage detected suspicious extracted JavaScript files, one of which was deobfuscated and contained significant obfuscation indicators. The primary attack vector appears to be exploiting these known PDF vulnerabilities to achieve arbitrary code execution.

Heuristics 7

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
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` `7031141cc0cd15c1bdeeef9d08c03422c3e089f9bb53028ead08709b22d56c40`	pdf-javascript-stream	PDF /JS object 7 at offset 0x25F4C	657 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` `360f9e685ef9feafbcbc79e4f300f7862e54e3eb2593ec3090bf73796385b7c5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x173	4841 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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