PDF malware analysis — malicious · 9212c54383532a4e

MALICIOUS

PDF

17.1 KB Created: 2010-01-01 07:27:45 Authoring application: Fexaxououazobb

MD5: 03a5bfc3deec7682a4ef84bb2890e3c5 SHA-1: ce785015053491931f8adfb25946e4beee2d5e81 SHA-256: 9212c54383532a4e06812c6d6e052735a6945d96daa0947a3e519b96bc4c713f

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF file exhibits multiple critical heuristic firings related to known vulnerabilities (CVE_2009_4324, CVE_2009_0927, CVE_2007_5659) which are associated with the execution of embedded JavaScript. The ClamAV detection of 'Js.Exploit.Shellcode-18' further supports the malicious nature of the extracted JavaScript content. The embedded JavaScript streams, particularly the deobfuscated 'legacy_pdfkit_stage_000.js', are indicative of a multi-stage attack designed to download and execute further payloads.

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 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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `96639031a74c37299efd11431cbbfe03a6e94ffae0ceb6ccc9dcaff2bbc388f2`	pdf-javascript-stream	PDF /JS object 12 at offset 0x4F6	1220 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s).
`javascript_obj0028_001.js` `ddeea98b63e0e4afcb1a08fa0a55080c7083adc8fae1b30ccafe7cd6ffaa08f0`	pdf-javascript-stream	PDF /JS object 28 at offset 0x1B9	2017 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `af14772eee3bfeed4257c337197dc9ee0f5c475d6288abbfdf742c68e96df52d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x7CD	30991 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 90 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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