PDF malware analysis — malicious · feaa5357cdd9143c

MALICIOUS

PDF

299.6 KB

MD5: 1888effe5da47d9dafe9b27519e0082b SHA-1: e23455f40774dbb276b8464954056cf8a9d3de88 SHA-256: feaa5357cdd9143c36dbc00aebe6befae4b8537460becdec28ba38ce06962814

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 including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The heuristics indicate that the JavaScript is obfuscated and likely concatenates strings to form executable code. ClamAV detected this as Js.Exploit.Shellcode-18, suggesting it attempts to exploit a shellcode vulnerability. The deobfuscated JavaScript, legacy_pdfkit_stage_000.js, is also suspicious and likely responsible for downloading and executing a secondary payload.

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` `66b500adb1a3cd3d032563006f424417324568a7c0bc6ef4dd48bd55160526be`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2462 bytes
`legacy_pdfkit_stage_000.js` `a0fd2926642261c66decbcc680dd0e9c002562b628b08c6485d8dc29176f5673`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xBB9	8430 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s).

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