PDF malware analysis — malicious · 1ae65b6c9f00e2f8

MALICIOUS

PDF

12.1 KB Created: 2009-11-23 19:46:15 Authoring application: PDF Library 3.1.2 (via PDF Library 10.4.2)

MD5: df2a3fb668b0e5ff1d60897a40f0f161 SHA-1: f1b58ebe9169dd6544e29ea1783570994f8aed96 SHA-256: 1ae65b6c9f00e2f89de97bd4ccafae8bee7d1ecf9a5f849383bd7460c5cb7eb0

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF file exploits multiple Adobe Reader vulnerabilities, including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992, by leveraging embedded and obfuscated JavaScript. Static analysis detected the use of Collab.getIcon, Collab.collectEmailInfo, and util.printf JavaScript functions, which are known indicators for these exploits. The embedded JavaScript, identified as 'legacy_pdfkit_stage_000.js', likely downloads and executes a second-stage payload, as indicated by ClamAV detection 'Js.Exploit.Shellcode-18' on an extracted artifact.

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` `3b035ebc51c26766b79d44b34e1ad319726473e39f196c69be2861098986b1c5`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37898 bytes
`legacy_pdfkit_stage_000.js` `4b4f54fe37a8c74e8b903c5c6fa69e97dc52b3e1e0630f77a79b7a22fdb2cd70`	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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