PDF malware analysis — malicious · 455511c8393a5363

MALICIOUS

PDF

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

MD5: 931ee465e0610b25d4cd2854eb5d8c05 SHA-1: 5ded29d0749907e30e49faf2307152aefaaf486d SHA-256: 455511c8393a5363fc6477e435b99f2912bc0c6a793b0db5412ee8a3689b6ced

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The sample is a PDF file that leverages multiple critical vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) to execute embedded JavaScript. The heuristics indicate that this JavaScript is likely used to download and execute a second-stage payload, as suggested by the ClamAV detection of 'Pdf.Dropper.Agent-1828732' and the presence of deobfuscated JavaScript files. The specific exploits targeted are identified by the heuristic rule IDs.

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)
ClamAV: Pdf.Dropper.Agent-1828732 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828732
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` `fc236cc3e24c2551b8ddec998bb7fc4fc525b6ff108dc41fae75a7b2f7bbd3a3`	pdf-javascript-stream	PDF /JS object 32 at offset 0x344	211 bytes
`javascript_obj0034_001.js` `8c1fe2561e10ae363983a4caca717616347ba18a0007167e1a8a41c1ecb8084d`	pdf-javascript-stream	PDF /JS object 34 at offset 0x426	304 bytes
`javascript_obj0036_002.js` `a780487599ab556f577ebea314d41c3e9459e441d6cf3d9a1f42f9cee73e8720`	pdf-javascript-stream	PDF /JS object 36 at offset 0x73	185 bytes
`legacy_pdfkit_stage_000.js` `fa8c9e6694afaf4808bc874680c28d3f0ae0e8412e9c94319cd5d5989cf5e9c6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x553	1825 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` `5bf3a7a59c2bde72baaf2a76e9e294afa36a2afa273a1e6df252251981fd8b95`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xB5E	2967 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` `73da873531a4746bb19470afff326f821fcbb280b91605764cc793b16d853ba5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1273	1657 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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