PDF malware analysis — malicious · f91e7f506cdae39f

MALICIOUS

PDF

3.5 KB Created: 2010-02-12 07:12:14 Authoring application: c98d4b9e48

MD5: d65b19abcb240638e6390ba0a797f3c0 SHA-1: 3bae7c78bce6ee715c8f8410349b209aeab0e9b0 SHA-256: f91e7f506cdae39f7d4f86a80f28a0b721202e3ab47c33d7fd3aeba4a67051a8

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits multiple known vulnerabilities including CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. The heuristics indicate that the JavaScript is obfuscated and likely used to download and execute a second-stage payload, as suggested by the ClamAV detection 'Js.Exploit.Shellcode-18' on an extracted artifact named 'legacy_pdfkit_stage_000.js'. The file's purpose is to compromise the user's system through these exploits.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0011_000.js` `1b02a1ba41b956092bca0dbd6428e75d3c97f55f34e4c20a268e271b1453b2bb`	pdf-javascript-stream	PDF /JS object 11 at offset 0xB2B	277 bytes
`legacy_pdfkit_stage_000.js` `ce06b386b92cf90dc2daa41d6d9acf33f602923456636ce0720dc6266ae5df6a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2EA	5754 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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