PDF malware analysis — malicious · 935588d17043316d

MALICIOUS

PDF

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

MD5: b550d380c7ceee6c2cfd1a03d5aca5d5 SHA-1: 2532975ec201899aff5befcd27c7346cb7656e57 SHA-256: 935588d17043316de8bb6304562b32d1cf8466e27c74f9144db192ee0fe3880e

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

Multiple critical heuristics indicate exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659 via embedded JavaScript. The JavaScript stream contains eval() calls and is further identified as a known exploit for shellcode. This suggests the PDF is designed to download and execute a malicious second-stage payload.

Heuristics 8

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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `148b1cfc1c8417e09d25d3e5b9e4508a025b458cf4f1de04ba99e1caa56c9644`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC3E	99 bytes
`javascript_obj0016_001.js` `a9c19327fdb9f88fe3a3b174fc8e93657ce0882b4b07092b3ec6dc2b55f8c50f`	pdf-javascript-stream	PDF /JS object 16 at offset 0xCE1	450 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0026_002.js` `a834e2320c5e40a4090503978fbfa2b6c5c6f442f41b56b211efc9930c5c3076`	pdf-javascript-stream	PDF /JS object 26 at offset 0xE51	148 bytes
`legacy_pdfkit_stage_000.js` `9eb7aefba91f09524c2ad385fe4834ea0fec3ccd69f08a1862f5660a69d3606c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1BB	6477 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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