PDF malware analysis — malicious · 2aff8df9d466c04d

MALICIOUS

PDF

4.4 KB Created: 2010-01-27 06:37:21 Authoring application: a4dda6

MD5: a2a5399cdee4e00ed49249554201db5c SHA-1: 1216d7bfb86b2adc9f3c1079fc663246ae6d7a04 SHA-256: 2aff8df9d466c04d3d388f574142a63998bf0595bc54c011c2a5926697064be0

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF sample contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659 via embedded JavaScript. An extracted JavaScript file, 'legacy_pdfkit_stage_000.js', was also flagged by ClamAV as 'Js.Exploit.Shellcode-18'. This suggests the embedded script is designed to download and execute a second-stage payload.

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` `ff82a1d685f83811137ed61e66e23d0cb1ea597dca84e27fd82d92cd66cf816a`	pdf-javascript-stream	PDF /JS object 12 at offset 0x20E	108 bytes
`javascript_obj0028_001.js` `7dfb76b165ec12f63f810478b71c1d1c0c3e4838d1f7a79f2bf970b093df113e`	pdf-javascript-stream	PDF /JS object 28 at offset 0x2CD	333 bytes
`legacy_pdfkit_stage_000.js` `c8cb2c2e080b20f07983dd2e8f3c3f03e06bfdcbd571a3eecc7c4c0e4ca69659`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x476	7782 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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