PDF malware analysis — malicious · b99bcbb9cfde1acb

MALICIOUS

PDF

5.0 KB

MD5: f089c6cd3faeaab254152827ae85a6a5 SHA-1: 6ff092062de3f6523489879cb175cd4524187631 SHA-256: b99bcbb9cfde1acbe35da15d5e40f73e7176a4ccd34907c1fdd75a221885ec4f

320 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file is malicious and contains embedded JavaScript, indicated by multiple heuristic firings related to PDF JavaScript actions and streams. Specifically, it exploits CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992 by leveraging PDF /Info fields to construct and evaluate JavaScript. The deobfuscated JavaScript stream (info_stride_js_000.js) likely downloads and executes a second-stage payload. The ClamAV detection also confirms its malicious nature.

Heuristics 8

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-36895 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36895
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_obj0014_000.js` `d5f2b98647f639d6ac7e22063dc44a2a511bf0c169df7c5cfb40e64ef6ac23f4`	pdf-javascript-stream	PDF /JS object 14 at offset 0x105D	683 bytes
`info_stride_js_000.js` `4ba8ff965f46a6c7fb8a13851b457fe6dc3e9bcd7e1d6607b93bce756ad2dbaa`	deobfuscated-js	PDF /Info fields via stride 5	6439 bytes
Detection ClamAV: No threats found 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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