PDF malware analysis — malicious · 9e251a34d947d1de

MALICIOUS

PDF

69.6 KB

MD5: 14363b4164cc2b658f46e61299b60080 SHA-1: cce0ab473f244002e34e0544900587c194f3e7e6 SHA-256: 9e251a34d947d1de65c855f8d9332848277e674f8dec62684983b81187312c82

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages multiple known vulnerabilities (CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) to achieve code execution. The heuristic firings indicate that the JavaScript is obfuscated and designed to exploit these specific CVEs. An extracted artifact was detected by ClamAV as Js.Exploit.Shellcode-18, further suggesting malicious intent. The script likely downloads and executes a second-stage payload, although the exact URL or payload could not be reconstructed due to obfuscation.

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)
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_obj0008_000.js` `8567f5463668ce60a6f77569d5453637d4dac7c82611dc8a9962bba4faa803c6`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2089 bytes
`legacy_pdfkit_stage_000.js` `045518b5d2528577a99478a4ee42221cb398fddde352f769a61e51f91dc8c1d3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xA44	4560 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s).

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