PDF malware analysis — malicious · 5071d4dda8b7422a

MALICIOUS

PDF

10.2 KB

MD5: 1e0749191cb3e3abbd3e63b3a856df99 SHA-1: 69b33430370d9e6b58c7ff8e290c7eebfb8310a1 SHA-256: 5071d4dda8b7422ab12112e78dfa01a03f4094e4fc366fc5880821d16eeddcba

270 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

This PDF file contains embedded JavaScript that leverages multiple known Adobe Reader vulnerabilities, specifically CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The JavaScript is heavily obfuscated using variable concatenation and the unescape function, indicating an attempt to hide its malicious payload. The primary function of this script is to exploit these vulnerabilities to achieve arbitrary code execution, likely for the purpose of downloading and executing a further stage of malware.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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` `424a004cc2eb4f331757926f9f9b79ab3c0bf485e0158b6e011d14ae55d24faf`	pdf-javascript-stream	PDF /JS object 7 at offset 0x233	46615 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 224 eval/decoder/string-building token(s).
`unescape_var_concat_stage_000.js` `47ba88fa2a9da9f0d434fb1c350dd8a7f94ec1d79e607b4621c6440c6f8226dd`	deobfuscated-js	unescape variable-concat decoded JavaScript (decompressed) at offset 0x284	6718 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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