PDF malware analysis — malicious · 051a991d633a8e3d

MALICIOUS

PDF

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

MD5: 0a7beef5daec5aca4058213c2c032d29 SHA-1: 327e424ce2aabe7bbcd38a518093ec6e8853b5db SHA-256: 051a991d633a8e3d0b95a5c7326a91c01bdfce8f14c0de1b1694ce07461c07a2

228 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF file that contains multiple JavaScript streams and exploits known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) related to media player and collaboration functions. The embedded JavaScript, including deobfuscated stages, is designed to execute arbitrary code, likely to download and run a secondary payload. The ML classifier also strongly indicates maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `2c8e0099fb74c1bb63b78158c737b87a771ad489f4ac56daeb6b64b32f938cd6`	pdf-javascript-stream	PDF /JS object 32 at offset 0x382	223 bytes
`javascript_obj0034_001.js` `4b35937a2fe658933fe07e1a030445d9b8aadd66de7929ad5f6de9a92d15194c`	pdf-javascript-stream	PDF /JS object 34 at offset 0x46F	288 bytes
`javascript_obj0036_002.js` `07b59b7ed4b9dabc0b00cb2a81aba5741e2ebb1fb68111915512509de3448087`	pdf-javascript-stream	PDF /JS object 36 at offset 0x7C	170 bytes
`legacy_pdfkit_stage_000.js` `0ec3904690de647645fbf925c783c101709f887c6404b0cbf596b0ee14e497ca`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5A9	1727 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` `824b7d6ddd542bd5652b9c7fd93f818223b9095e3edf86f5fc46e2b5c69ddc4c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xB71	2758 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` `2177691c72c7500f9286de874c9386117a49c6bfed0e841b017e890a01a99ea6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1214	1544 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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