PDF malware analysis — malicious · c2e3f300417ec02c

MALICIOUS

PDF

4.2 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe

MD5: 8ce428581ec62ff1d7d988b01846f917 SHA-1: aa040f19042481b3cae811594dfe2865e6be2cbf SHA-256: c2e3f300417ec02c184668df2be584de5d81a3e43a2305ec55a8e8451042aa61

398 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: JavaScript T1059.003 Command and Scripting Interpreter: Windows Command Shell

This PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These exploits leverage embedded and obfuscated JavaScript, including a deobfuscated stream identified as legacy_pdfkit_stage_000.js, to achieve arbitrary code execution. The primary intent appears to be the delivery of a second-stage payload, as indicated by the ClamAV detection of a JavaScript exploit shellcode. The file is classified as malicious due to these exploit attempts.

Heuristics 10

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.Exploit.Agent-21170 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-21170
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `29c42e175a66272faee8b4e921f8a0f5cc81aacff43ba21aeba94ae41a8cbda5`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC7E	59 bytes
`javascript_obj0016_001.js` `d81958cb14f3fe4b74fb1c1a9eb6b6d29bb2e1f0e617f023169be6a773575fdb`	pdf-javascript-stream	PDF /JS object 16 at offset 0xD09	135 bytes
`javascript_obj0026_002.js` `30439b6e1eef14d16582940e17a06cf57a4d10a6eb05968af29c2845092822d4`	pdf-javascript-stream	PDF /JS object 26 at offset 0xDD7	47 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `511dab7aa75ff9454424ddb914b3a12eb231b92343c1772f35165327d85000a6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x23B	6358 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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