PDF malware analysis — malicious · 952d6626d837d9de

MALICIOUS

PDF

159.7 KB

MD5: b26f815722fecacaa9d5362a3cbc967e SHA-1: 00415a51c6b8b7d9a81fab9ac7665fb5beba7b8b SHA-256: 952d6626d837d9de8f09d228403ba96ab4f30545386be861b78b212db57a7d04

258 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript that leverages multiple critical vulnerabilities (CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) related to JavaScript execution within Adobe Reader. The heuristic firings indicate that the PDF launcher concatenates and evaluates JavaScript derived from metadata fields. An extracted artifact, 'legacy_pdfkit_stage_000.js', was detected by ClamAV as 'Js.Exploit.Shellcode-18', suggesting it contains malicious shellcode. The script's intent is to download and execute a second-stage payload, as indicated by the shellcode detection and the nature of the exploited vulnerabilities.

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` `70aff283a8a0d87457bc6f06545745b00c5a21b04e939ff6f6329a6529a55e1c`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2462 bytes
`legacy_pdfkit_stage_000.js` `c84bb2202f81c968559e0c591b98da8e3d1be0f4496596183c4b2ee169bd7bfe`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xBB9	4452 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.