PDF malware analysis — malicious · 5679e67d0807c325

MALICIOUS

PDF

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

MD5: 1af453d4d70954770f48c1979a6731f6 SHA-1: f5052156de6df414f8048ad7932c28b979c85f79 SHA-256: 5679e67d0807c325855327615287b085507ca5f62cbb83231cd63e2be0058826

258 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains multiple critical heuristic firings related to known CVEs (CVE_2009_4324, CVE_2009_0927, CVE_2007_5659) that leverage embedded JavaScript. An extracted JavaScript file, legacy_pdfkit_stage_000.js, was detected by ClamAV as Js.Exploit.Shellcode-18, indicating it likely contains shellcode or exploit code. The overall attack pattern suggests the PDF is designed to exploit these vulnerabilities to download and execute a secondary malicious payload.

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` `0dc339edcbd174ef7608b92c8fe92c286833da581dc60e28d402a03f9f26fdd6`	pdf-javascript-stream	PDF /JS object 6 at offset 0x14A	406 bytes
`legacy_pdfkit_stage_000.js` `89778df47168996933f3a922c55165cfd5b8af1b59d004fd697f567dcfc63c26`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2EA	11270 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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