PDF malware analysis — malicious · 94eb47811f14ba42

MALICIOUS

PDF

12.0 KB Created: 2009-11-09 19:41:07 Authoring application: PDF Library 6.7.2 (via PDF Library 10.8.2)

MD5: 40b819c1beb8bc764c61ae54969f77e1 SHA-1: 5bc5b535cacf775f69345e50a8c5a9f588b53ceb SHA-256: 94eb47811f14ba422abe625523a23bd3ecddd3d32f0b61687ccbf1a83deb0b24

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

This PDF document exploits multiple Adobe Reader vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The exploitation involves deobfuscated JavaScript found within embedded streams, which is further indicated by ClamAV detection of 'Js.Exploit.Shellcode-18' on an extracted artifact. The primary goal appears to be the execution of a second-stage payload.

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` `cb203cd8585261bd1e2b943074914cc9b2614ac24d1bcf4da763ff17dac9f81e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	38056 bytes
`legacy_pdfkit_stage_000.js` `4653f73ee4c424563e213ccc30001699c776b4409caacb45c7434adc30bc7601`	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).

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