PDF malware analysis — malicious · fb7f004ed0c02401

MALICIOUS

PDF

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

MD5: 7522ab8f385e855c98171fbdb236a8b1 SHA-1: 80a72d5aafab90e7bfb09c1b12af12340e2068bf SHA-256: fb7f004ed0c02401bd61daa2f6801f9703325e521c1e6d9edc8ec158cf9be8bb

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains multiple critical heuristic firings indicating exploitation of known CVEs related to PDF JavaScript execution. The embedded JavaScript utilizes eval() and unescape() functions, common in obfuscation techniques. The script's intent is to leverage these vulnerabilities to execute arbitrary code, likely to download and run a second-stage payload. The specific CVEs identified are CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659.

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `3eb2d4c8f27732bfc5d9fde38e12775cf02120f1385d73b647afbd0d3b743919`	pdf-javascript-stream	PDF /JS object 32 at offset 0x417	129 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `0a9615c0bd66957d4a7c5d151fd0ad624ff01edfabbb8693c073470c078d6eeb`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4D1	124 bytes
`javascript_obj0036_002.js` `8318ed54a566bfe7937322c30207c7092ee332038ea4c73e828cc1667d268870`	pdf-javascript-stream	PDF /JS object 36 at offset 0xFF	133 bytes
`javascript_obj0038_003.js` `597076596fc2a9b6bd047e67374b9dc1e3bf8ba242cff29e545e06960a70d315`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC2F	158 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `fbe995402e190d3b9f43d9b6a6869c87317894a25b63d9d338a6590a6fa9a30a`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	37 bytes
`legacy_pdfkit_stage_000.js` `e5201b485b694b4fecf4ceabde421324cabc49cc07f73047f1c5fe60db3ec1c6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5BD	1634 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `f1ce49e431311f1263dfbc1e9ec2ec6aa80fc6cb24e9f0cb45422b1d78fcdc22`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD58	1800 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `a65b225f4a3ece751201cfc973021f619380f9e9a4652b298101fd14cdccd4ac`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13C1	2938 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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