PDF malware analysis — malicious · eb091a97da4b7b1d

MALICIOUS

PDF

18.3 KB Created: 2010-01-01 07:27:45 Authoring application: Fexaxououazobb

MD5: 34df67295cb51ebedc68cf81e65b7078 SHA-1: ca35e45072823b9d52be430f56fb43b0c6f880aa SHA-256: eb091a97da4b7b1d1721efa450c3619ba331195a462dc0686b568e45c2b71a23

258 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are leveraged to execute embedded JavaScript. The extracted JavaScript, particularly 'legacy_pdfkit_stage_000.js', appears to be heavily obfuscated but is flagged by ClamAV as 'Js.Exploit.Shellcode-18', suggesting it attempts to download and execute a second-stage payload. The presence of these exploit techniques strongly indicates malicious intent.

Heuristics 7

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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `1984c4ee6c6d14ddf66f4638d21814a684bc2e5685cb7c4b77524860583f0647`	pdf-javascript-stream	PDF /JS object 12 at offset 0x4BC	1184 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`javascript_obj0028_001.js` `1d2e2f8cade8a3b3e91e5a8a2645b1302cf218d9353f20160898ec3040c4120d`	pdf-javascript-stream	PDF /JS object 28 at offset 0x1B9	1619 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `483bc5672eee307ec5e51c4eed3400f3350ad187ca8633c13a58587a95155f71`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x75D	32914 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 84 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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