PDF malware analysis — malicious · 3031f95616db642b

MALICIOUS

PDF

6.0 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe

MD5: 464476f1db303a5ce1987b82dc30209c SHA-1: 6e27061e93fcbd007319ea739d053af4e811119f SHA-256: 3031f95616db642b6ff5192a2576f51952459a81517bb826e790b0555bbd618f

198 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript/JScript

The PDF document contains embedded JavaScript that exploits known vulnerabilities (CVE-2009-0927 and CVE-2007-5659) to achieve code execution. The heuristic firings indicate that this JavaScript is designed to download and execute a secondary payload, as evidenced by the ClamAV detection of 'Js.Exploit.Shellcode-18' within an extracted artifact named 'legacy_pdfkit_stage_000.js'. The attack pattern is consistent with a malicious PDF designed to compromise the user's system via exploit.

Heuristics 6

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)
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `ecfb64107cc9b0886fd188e0563373984cd811c822fd206a3656d7eb59125fb1`	pdf-javascript-stream	PDF /JS object 6 at offset 0x13E0	151 bytes
`javascript_obj0016_001.js` `baf860c9d50d6ee2f9c09688106310b08081296c2bb13f6b0b765d76d10aeb7e`	pdf-javascript-stream	PDF /JS object 16 at offset 0x14BD	200 bytes
`legacy_pdfkit_stage_000.js` `fe2dc017201ae4cbc436c94890de59521529a5a8ceb37b5396448a00809ba392`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1E7	4949 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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