PDF malware analysis — malicious · 823370b227a5fc22

MALICIOUS

PDF

10.3 KB Created: e1svrt Authoring application: Adsfgddfobe (via sfgasdfgsd)

MD5: 3b549e73856d4baa4cde1f36327bc947 SHA-1: 671e8e9e751049ec6c2b360815cee5e115c56940 SHA-256: 823370b227a5fc224762804fb22ff86afcc0173f884eb6f5fe99b0a3490d5a0f

258 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 used to execute embedded JavaScript. The extracted artifact 'legacy_pdfkit_stage_000.js' was detected by ClamAV as 'Js.Exploit.Shellcode-18', confirming its malicious nature. The script's purpose is to download and execute a second-stage payload, which is a common attack pattern for PDF exploits.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `66c50cc2efcce8ceed66776eaa5cdb81b04090431d7bb70d2f418a0206ab234b`	pdf-javascript-stream	PDF /JS object 6 at offset 0x14A	603 bytes
`legacy_pdfkit_stage_000.js` `456f157add88e98d2346a6cb595942f1a6913a598b37cb5205b11fc093034646`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x35A	11348 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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