PDF malware analysis — malicious · 9b872968ba1e9988

MALICIOUS

PDF

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

MD5: 0cd9036123488e688ac602bc7a43ef05 SHA-1: d2d4a75a3bbeeb171a41898abb2ef7cbf78e7b5b SHA-256: 9b872968ba1e9988f7fb4e5987718be038f5618fbca30da60f88a8a29f5eaddf

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659 through embedded and obfuscated JavaScript. The 'eval()' call and the 'Js.Exploit.Shellcode-18' detection on an extracted artifact strongly suggest that the script is designed to download and execute a second-stage payload. The file's structure and the nature of the exploits point towards a malicious PDF designed for payload delivery.

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` `5f269d3bdbd080c1b31bff394424055866106e203314ad52c1f52fbbfe79d3c4`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC12	108 bytes
`javascript_obj0016_001.js` `e0cbf97ed08ff964851358efb255afee1c6fca1ddf80888d385fa0b0aa6cd2e5`	pdf-javascript-stream	PDF /JS object 16 at offset 0xCBB	489 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0026_002.js` `ed4452b3921e4a8141c0b85c0071fc86897afe572559c38f4470328acd52bccf`	pdf-javascript-stream	PDF /JS object 26 at offset 0xE3E	169 bytes
`legacy_pdfkit_stage_000.js` `a58d01f67e7dd1130bf3d29c275fa16ccc1dc90da27e33bce6f50626766bdf5e`	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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