PDF malware analysis — malicious · 35ea890fc7b9ef6b

MALICIOUS

PDF

12.2 KB Created: 2009-12-18 19:48:82 Authoring application: PDF Library 3.9.10 (via PDF Library 6.10.9)

MD5: 2cd122da8d83bb6d6c99e866b3257009 SHA-1: ace32cdf591dc3b9b6bdbe9298b37672ff937ba1 SHA-256: 35ea890fc7b9ef6b0bc8557d44b3fdaf98b6030143c83f3427ef6f5c70e27962

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link T1204.002 Malicious File

This PDF document exploits multiple critical vulnerabilities in Adobe Acrobat, specifically CVE-2009-0927 (Collab.getIcon), CVE-2007-5659 (Collab.collectEmailInfo), and CVE-2008-2992 (util.printf). These exploits are triggered by embedded JavaScript, which is obfuscated and decoded using ASCIIHexDecode and other methods. The embedded JavaScript is further deobfuscated into 'legacy_pdfkit_stage_000.js', which ClamAV identifies as 'Js.Exploit.Shellcode-18'. The primary intent of the script is to download and execute a second-stage payload, indicated by the exploit signatures and the nature of the vulnerabilities targeted.

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
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` `cf5df92b022090db3ae532b1959e3c79866aa175df2573869c44ecae15159ac3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	38142 bytes
`legacy_pdfkit_stage_000.js` `9bd16073cb8616716a33ec7f386e34a0221a92558b725e558e58910cf0369ac0`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x268	9874 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).

Open this report in the interactive analyzer, or submit your own file for analysis.