PDF malware analysis — malicious · a2750c2d74253e5e

MALICIOUS

PDF

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

MD5: 0a3c25f599f4791ffb4de5d4d3d18d1c SHA-1: c678587438356f0d4673426f83672186177bf9e2 SHA-256: a2750c2d74253e5eb4ece5cc9e5fea71c66129d8c8fe835ebec1abc69c1c5eba

198 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious PDF T1059.001 Command and Scripting Interpreter: 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 associated with the execution of embedded JavaScript. The presence of deobfuscated JavaScript files further supports that the sample is designed to run malicious code. The exact intent of the script is not fully discernible due to obfuscation, but it is highly probable that it downloads and executes a second-stage payload.

Heuristics 6

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)
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` `85d6f4f70def22c5ea19174773c5b0b33625108f933ecff0e4fe79b5966fc6bd`	pdf-javascript-stream	PDF /JS object 32 at offset 0x3A6	232 bytes
`javascript_obj0034_001.js` `7f54d250a669b677d6408ce91907c0a4e518f94b114e11d7d6f19040480134d0`	pdf-javascript-stream	PDF /JS object 34 at offset 0x49D	360 bytes
`javascript_obj0036_002.js` `f951d79f93b375adec3b488501fec595e84cfdd952608596f3f576371b27757c`	pdf-javascript-stream	PDF /JS object 36 at offset 0x7C	224 bytes
`legacy_pdfkit_stage_000.js` `39dff5f0bd470fc6d533b74814e8964ef1586e2284a9735e5d1afebed9cb6424`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5E8	1841 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` `4e598c9044f853b58aa44faa2ed1b7e3fec9bedae15bbdef64ac5466d17cdda6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xC0B	2986 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).
`legacy_pdfkit_stage_002.js` `48a783c1377b1cce8856db4ddc1d86a357485e42c425fd07704c8f5adb29f996`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1337	1658 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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