PDF malware analysis — malicious · f0d44df6a3c1cc32

MALICIOUS

PDF

4.4 KB Created: 2010-01-26 12:13:05 Authoring application: ad3622

MD5: 6563d68dea0361acc74c45459781e8ea SHA-1: 92e89e81b7f1575ebe5c7a769b2e90a436b404b3 SHA-256: f0d44df6a3c1cc32b327b1d0043d8bf860222a78b26d6c2a8fe07b9e31e67148

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are leveraged to execute embedded JavaScript. An extracted and deobfuscated JavaScript file, 'legacy_pdfkit_stage_000.js', was also detected by ClamAV as Js.Exploit.Shellcode-18, suggesting it contains malicious shellcode. The JavaScript likely downloads and executes a second-stage payload, indicated by the presence of a URL within the deobfuscated script.

Heuristics 7

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
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_obj0012_000.js` `c8504843b5578f696add35d7e75e5698f1df1d88a84531b71d262410d6093942`	pdf-javascript-stream	PDF /JS object 12 at offset 0x20E	109 bytes
`javascript_obj0028_001.js` `daab8bad3556ba3fdb5c9ce2eb35c33b4a4a608c31efeceb32ca8930c123c84a`	pdf-javascript-stream	PDF /JS object 28 at offset 0x2CE	340 bytes
`legacy_pdfkit_stage_000.js` `3b8706dd5e113d7803f8388c014aac4428318309f2d235c1a306f436c6e76829`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x476	7929 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 14 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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