PDF malware analysis — malicious · fa717a22578ebcb7

MALICIOUS

PDF

7.7 KB Created: 2009-10-20 19:46:18 Authoring application: PDF Library 7.5.6 (via PDF Library 10.7.3)

MD5: 3de5ad96241dad40c8416ab15372b792 SHA-1: 33e04dd3d21666d3980847dec1621a1edf72066f SHA-256: fa717a22578ebcb7aaf89002b0f4a76baf00f0799ef94336b814c60d10fb8666

316 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1059.007 JavaScript

This PDF document exploits multiple known vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992, leveraging JavaScript actions and embedded JS streams. The analysis indicates that the embedded JavaScript, particularly in 'js_property_alias_stage_000.js', is obfuscated and likely responsible for downloading and executing a second-stage payload, as suggested by the ClamAV detection 'Js.Exploit.Shellcode-18'. The use of ASCIIHexDecode filters further supports the presence of obfuscated exploit code.

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.
Suspicious extracted artifact high 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.
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
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` `8dfb84f3f0ec7825a0763f9a702bf2e1f0c59baadc49d31b0ba67c15e56b92cc`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37521 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` `366b9db9fce1c4818a369564fe14c3930ec1e4c1c57801803dbb6deb2c9eb3ef`	deobfuscated-js	JavaScript hex-escape property alias normalized stage at offset 0x268	9393 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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