PDF malware analysis — malicious · da18e5769a8addd7

MALICIOUS

PDF

5.3 KB Created: 2010-02-13 10:36:55 Authoring application: a5a30d

MD5: a0a8ad26ad45bee3b95d6953dcee1c0a SHA-1: 484bcc240aad4478e83d1144c3c946d952a2ff04 SHA-256: da18e5769a8addd7a9fd632c291a6005e502d8467db940e1929763c47350c3c6

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1071.001 Web Protocols

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, as evidenced by the 'PDF_JAVASCRIPT' and 'PDF_JS' firings. The extracted artifact 'legacy_pdfkit_stage_000.js' was flagged by ClamAV as 'Js.Exploit.Shellcode-18', strongly suggesting it's a malicious script designed to download and execute a secondary payload. The PDF structure itself appears to be a launcher for this exploit chain.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0014_000.js` `17676f1eeb915a2b1b55b0dcf15a462cbf1aef9a644466db55828771684fd771`	pdf-javascript-stream	PDF /JS object 14 at offset 0x1B8	454 bytes
`legacy_pdfkit_stage_000.js` `06ae6603764fae4e9f7a0c7498763bb70ede0d4c95a84149c25d1e26876dd8be`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x406	7510 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 17 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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