PDF malware analysis — malicious · cd640f6cc7763a97

MALICIOUS

PDF

4.5 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: e3783928c19914791fe082b73d5f985c SHA-1: 77caf3a01ae13a9d18cdfb44b643ba8c7b2ebb32 SHA-256: cd640f6cc7763a97e2fa933a89ada6729ca940532bbcb043cc26dbdb099f67f0

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Script Execution T1204.001 Malicious Link/URL: Malicious File T1204.002 Malicious Link/URL: Malicious HTML

The PDF sample 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 and obfuscated JavaScript. The script's primary function appears to be downloading and executing a second-stage payload, as indicated by the deobfuscated JavaScript found in legacy_pdfkit_stage_000.js. The document body is unreadable, but the combination of exploits and script execution strongly suggests a malicious intent, likely for malware delivery.

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)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `1e8b86d7bb68f599ea29341b70498b4f7d03686a0e678c25390a5c0432628655`	pdf-javascript-stream	PDF /JS object 32 at offset 0xC7C	109 bytes
`javascript_obj0034_001.js` `fbe981ddccc84f3c990185e0b94b2baba60b4a329c845390af917778f94e72a1`	pdf-javascript-stream	PDF /JS object 34 at offset 0xD38	183 bytes
`javascript_obj0036_002.js` `5ff9f4f5eb5239dcc888fbb2fcde54a1fffbe2dbd85e40e8c3427fe82a07295a`	pdf-javascript-stream	PDF /JS object 36 at offset 0xEAE	198 bytes
`javascript_obj0038_003.js` `91c6d05feed2a7c5a1a6cf59a36649013743cf78ce86541e268cc2c1db227c7d`	pdf-javascript-stream	PDF /JS object 38 at offset 0xF96	38 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `bc8faa385ef009b1d1b34651903412c5e87a38b60c23dc36a13b7af399bd41f9`	pdf-javascript-stream	PDF /JS object 78 at offset 0xE17	32 bytes
`legacy_pdfkit_stage_000.js` `dfef61b3d4e6c653654c75ce032eb914b11d3cb4dcf194b6d8107ad6873ea305`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x20C	6363 bytes
Detection ClamAV: No threats found 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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