PDF malware analysis — malicious · 55609f16ed3fd5e3

MALICIOUS

PDF

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

MD5: 1bcfdb15a1d989f50ef64f58f53d4ac0 SHA-1: 57b88252d465d27835c7ef7518d47066881adad3 SHA-256: 55609f16ed3fd5e32f80d8e43afb7f0809f3d49b23c54e7d741bc0aaf6321c3d

298 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, which was further identified as a malicious exploit shellcode by ClamAV. The deobfuscated JavaScript likely downloads and executes a second-stage payload, although the specific URL or execution method is not directly extractable from the provided evidence.

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` `b8e2306aa6be91347fabe745c2a5fade9141548a250932a8a136fa97a4149bb7`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC0B	99 bytes
`javascript_obj0016_001.js` `08b8e4aa2af949017978bbfddfb72f9ffc770564189ddb3a212915db0042d51a`	pdf-javascript-stream	PDF /JS object 16 at offset 0xCAE	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` `4933dbf31ac2a9000d974a503f212abe1306e3e67c500924adcad413c36ab6fc`	pdf-javascript-stream	PDF /JS object 26 at offset 0xE1E	148 bytes
`legacy_pdfkit_stage_000.js` `ade6a3e33cbe3b1c7419ce106f0f541701c9d0f110cd7f970be14b9a28f1df12`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1BB	6429 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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