PDF malware analysis — malicious · b2cc1e2324ae1f81

MALICIOUS

PDF

2.9 KB

MD5: 257042fd2ec57cd4e5390e0a657ce730 SHA-1: 61cf4ff0aa3e38ece3222e24ba38f738de0d84a1 SHA-256: b2cc1e2324ae1f81cfdf907868e5163c3fde4883c5f72d58dbcc13feca7cc7fe

358 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Script Execution T1204.001 Malicious Link/URL T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages multiple known vulnerabilities in Adobe Reader to achieve arbitrary code execution. The embedded JavaScript is obfuscated and uses eval() to execute, indicating a downloader or exploit loader. The ClamAV signature 'Pdf.Exploit.Agent-35646' further confirms its malicious nature.

Heuristics 9

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 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)
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_obj0007_000.js` `a5560197656c32883eb7c52b396b667a89ed1b9123f7fc1f4f0508eb61513824`	pdf-javascript-stream	PDF /JS object 7 at offset 0xDB	27758 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `25444c9a4583965ac2e9017b6a0a3bca60ca7f70ed8ae677d3b22ecb93c862c5`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0x113	7454 bytes
Detection ClamAV: Pdf.Exploit.Agent-35646 Obfuscation or payload: likely Carved artifact contains 13 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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