PDF malware analysis — malicious · da1790f18d5384f9

MALICIOUS

PDF

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

MD5: 28c3be9f127bbf9301151a6ebe823f05 SHA-1: 9db08a334189c700190b72182eac0ec3bbfc4432 SHA-256: da1790f18d5384f988aea4a57b8c033cdd1dd6498bd72fbbe8305251173e12f0

260 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The sample is a PDF file that exhibits multiple critical heuristic firings related to known PDF exploits (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659). These exploits are designed to execute embedded JavaScript. The ClamAV detection name 'Pdf.Dropper.Agent-7311448-0' further indicates its dropper functionality. The deobfuscated JavaScript files suggest a multi-stage download and execution process, typical of a dropper malware.

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-7311448-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7311448-0
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` `78fe8b825c3824a2401dc38c3a7288c2da69d29d5c7322777d78e81ef744ae1d`	pdf-javascript-stream	PDF /JS object 32 at offset 0x34A	271 bytes
`javascript_obj0034_001.js` `f1307886e99aed32dca0c3cdf4e8e91cd64a082aeddad9148275fed3f5cd2522`	pdf-javascript-stream	PDF /JS object 34 at offset 0x442	345 bytes
`javascript_obj0036_002.js` `426c8bf684deb644eef948db068018e650e8128b6555e52b1dad344c8b945907`	pdf-javascript-stream	PDF /JS object 36 at offset 0xBC	236 bytes
`legacy_pdfkit_stage_000.js` `de0a84f644c282c4c2e84ff204cd581c0f7ea198155403bb40e5214bda4001a7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x584	1676 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` `89747115a0c2859a29790bcc1302f256940ebf818804d9c0d37ad82490c82a9f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xB30	1842 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` `959242c5d95abe63ae41f9ae34e2f25098d08c0d6eeafb64d65e7ecf1f3305f3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x10C1	3022 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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