PDF malware analysis — malicious · 487a9747636516cc

MALICIOUS

PDF

127.5 KB

MD5: cc3c3181a38782ac99fd5ee60bf10499 SHA-1: 51122bae3fe441dc58da28e0aabb8c39dfa9b53b SHA-256: 487a9747636516ccf62c44157effbd512766f623c081535953a56ceeabf461ba

318 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 exploits multiple known vulnerabilities in Adobe Reader, including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These exploits are designed to execute arbitrary code, likely to download and run a secondary payload, as indicated by the detection of 'Js.Exploit.Shellcode-18' in an extracted artifact. The presence of the deobfuscated JavaScript file 'legacy_pdfkit_stage_000.js' further supports this. The attack pattern is consistent with a malicious PDF designed to compromise the user's system through exploit execution.

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: Pdf.Exploit.Agent-36307 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36307
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` `b1042fdb326dc3082e278dc3b8ad7f4334074c4d6e6b5fc74ddd9886aa740443`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	3243 bytes
Detection ClamAV: Pdf.Exploit.Agent-36307 Obfuscation or payload: unlikely
`legacy_pdfkit_stage_000.js` `50bdfb33af411e13c46f089cbe68de8a9fc48df05d969aff4ac9655369f1dde8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xEC6	6024 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).

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