PDF malware analysis — malicious · ac7564d96dbb78ef

MALICIOUS

PDF

7.5 KB Created: 2009-11-15 19:42:09 Authoring application: PDF Library 8.3.2 (via PDF Library 7.5.4)

MD5: 6ffee77c09b4143bb2e7c02ee40eb117 SHA-1: 9ee514eaad4716d1199672847afcc48efe97f478 SHA-256: ac7564d96dbb78eff4db57e259d5b25c82691b1a7f70de4e4c10dba0b96cf095

296 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file exploits multiple known vulnerabilities (CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) by leveraging embedded JavaScript. The JavaScript is obfuscated and uses hex-escape sequences, indicating an attempt to evade detection. The heuristics also indicate that extracted JavaScript artifacts were flagged by ClamAV with a signature for Js.Exploit.Shellcode-18, confirming the malicious nature of the embedded script. The primary attack vector is the exploitation of these CVEs within Adobe Reader.

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)
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 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.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `8a2a71f25056ba0818a75bf4220639f08ef1d81690b0fa069e3eb72c5540f576`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37449 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long hex-escaped blob(s).
`js_property_alias_stage_000.js` `3b435a464e7fab8bc901f6eb757495002e57a0caae95916b589904b5400d8ced`	deobfuscated-js	JavaScript hex-escape property alias normalized stage at offset 0x268	9375 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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