PDF malware analysis — malicious · 91bac52acf36bb05

MALICIOUS

PDF

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

MD5: 038b7a7e851a928f8acf5a42c5b9b6d7 SHA-1: bffd03d238f6f59fdde2ff27621c6e21d8eb4c06 SHA-256: 91bac52acf36bb052c86f83fa26b95481fee7529fd5895aafcbc4b5ab5c9b1a1

198 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

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 suggests the script's purpose is to download and execute a secondary payload, a common technique for initial access.

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` `903ae2537321bb9610a7f34fa6f1a355be9439a271bda20efdb325e4ef0822ae`	pdf-javascript-stream	PDF /JS object 32 at offset 0x378	310 bytes
`javascript_obj0034_001.js` `fc4643a09d73f7b0c49d4603175c5cfc5c35dd7ff47456fcb277e5e6068a1aba`	pdf-javascript-stream	PDF /JS object 34 at offset 0x485	481 bytes
`javascript_obj0036_002.js` `1d96a9275a07a572e12f0539aa1cbd4705de32a3ea8a1c823a67fe1a5756856c`	pdf-javascript-stream	PDF /JS object 36 at offset 0x7C	314 bytes
`legacy_pdfkit_stage_000.js` `91be26a3bf133dc3029bb87d5ef62aa711d3453642ddd7fd9345ec23c910ee6c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5E5	1646 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` `13c62319adb3cc8074e3213806d6dcefd470745523b2bdeb321cbd45f3894e45`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xBEE	1806 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` `102d5567e3403a6fe098fa4f3ecfaaef8288a033df2a7f2ce93f0cb8d823f6f3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x11CC	2950 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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