PDF malware analysis — malicious · 1d1e7e4b5fab5920

MALICIOUS

PDF

12.0 KB Created: 2009-12-17 19:45:67 Authoring application: PDF Library 5.1.9 (via PDF Library 4.4.8)

MD5: 35f83a5196f10a53f7b541a668c3b50e SHA-1: f5bbeb8f179e004d628a11ae61bcbbcc9728319c SHA-256: 1d1e7e4b5fab59201c79643a686a1756b8277cf3b7cef7c55ea24c4221391ed3

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF document exploits multiple known Adobe Acrobat vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These exploits are triggered by embedded JavaScript, which is heavily obfuscated and likely downloads and executes a second-stage payload, as indicated by ClamAV detection 'Js.Exploit.Shellcode-18' on an extracted artifact. The document's metadata suggests it was authored using older versions of PDF Library, potentially targeting users with unpatched Acrobat installations.

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` `430aa1ac57fb117c603ee4aa646dfbfa72ec37077b582ed59358947901f4f4d6`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37345 bytes
`legacy_pdfkit_stage_000.js` `4201687108249517af7cf969ca08153309b56d4691d58c67857d7d2af9309adf`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x268	9868 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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