PDF malware analysis — malicious · e6ba48dc8b309df0

MALICIOUS

PDF

74.9 KB Created: 2009-11-24 19:42:89 Authoring application: PDF Library 4.7.7 (via PDF Library 8.8.2)

MD5: fbc32545a6e427a48e5578128b09ee73 SHA-1: de3bc1df0502b599d20553fef402aac5207b915a SHA-256: e6ba48dc8b309df07abf4b6311fc44febeb20038429585f2e9b9ae85975a9c1c

338 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF document is malicious, leveraging multiple critical vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These exploits are triggered by embedded JavaScript, which is further obfuscated and decoded. The primary goal appears to be the execution of a second-stage payload, as indicated by the deobfuscated JavaScript file 'legacy_pdfkit_stage_000.js' and ClamAV detections on extracted artifacts. The attack pattern involves luring the user to open a malicious PDF that exploits these known Adobe Reader flaws.

Heuristics 9

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: Pdf.Exploit.Agent-36110 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36110
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
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` `7f7574716f14ed88d892952e707dd022984f2f37d640a997ce0469aab31a35bc`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	37859 bytes
`legacy_pdfkit_stage_000.js` `a0a053f2eb67a82bc143a58c18e8a3d1bc65e31504d037b842b0e79dc77f3237`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x1A5	9796 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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