PDF malware analysis — malicious · 2e8f0646f43e5c9a

MALICIOUS

PDF

4.3 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe

MD5: 0f2b9ae8fe8ce4aa31c3652839272951 SHA-1: 6a78dbf3886c66fbeba747f4e0a0f1da101e3608 SHA-256: 2e8f0646f43e5c9afc356d3c2a6d1102b72d83233b68cacb959ffa024da91251

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The sample is a PDF file that leverages multiple critical vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) to execute embedded JavaScript. The JavaScript, identified as Js.Exploit.Shellcode-18 by ClamAV, is heavily obfuscated and likely downloads a second-stage payload. The PDF's structure and the nature of the exploits suggest a malicious document designed for initial compromise.

Heuristics 8

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
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)
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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `cd3ee46c7e180cb902624bfb1a3f1d74967338d0fd8443f17a36196e5e0ccf7b`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC10	99 bytes
`javascript_obj0016_001.js` `818847d6399efc0b74a2ee3a0d9fff853eeee576311cfc6b516f7b20beb176cf`	pdf-javascript-stream	PDF /JS object 16 at offset 0xCB3	450 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0026_002.js` `617652ddff1a548f6cdfc6f871846e0d0eb70549e43a2955183965eafd3b5c6d`	pdf-javascript-stream	PDF /JS object 26 at offset 0xE23	148 bytes
`legacy_pdfkit_stage_000.js` `7885a25479c7a3011a8cb4b1933d30c416bbf65f584c4bbcf3b90aa9e68b07d3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1BB	6435 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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