PDF malware analysis — malicious · 22c3e525c69d0997

MALICIOUS

PDF

13.6 KB

MD5: 2fddea90f8f02b61d7a1050157fd563e SHA-1: c8fcf46e8155c1878e23c27b2c80dc1d52d9ae4b SHA-256: 22c3e525c69d0997709cd6d1d16deb1878c218e08bf1359d560c9ea64d892ffb

298 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.001 PowerShell T1059.003 Windows Command Shell T1059.007 JavaScript T1059.012 Windows Registry

The PDF file contains embedded JavaScript that exploits multiple Adobe Reader vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The JavaScript employs a custom Base64 decoder to deobfuscate and execute a second-stage payload, as indicated by the 'Js.Exploit.Shellcode-18' ClamAV detection. The extracted JavaScript streams and the heuristic firings strongly suggest this is a malicious document designed to compromise the user's system through known PDF reader exploits.

Heuristics 8

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.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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_obj0008_000.js` `758a92647885a3c9e57f1cb2e6d3ca86f1dbc08b1547d61b789f4245fcfc137e`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	13181 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`custom_b64_stage_000.js` `6f93069c0eb7e713b5e011ce0881773b6f9d5d6bc3134213a95f0d7f5ad5fac8`	deobfuscated-js	custom Base64 decoded JavaScript layer 2 (PDF /JS object 8) at offset 0x6E8	6488 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.