PDF malware analysis — malicious · c54b0607a5028f24

MALICIOUS

PDF

3.5 KB Created: 2010-02-12 07:13:43 Authoring application: c14d3e8dfe974

MD5: ed98420034a30f5f3be2cdeec377cc32 SHA-1: de12f9d4976a62d092c9344aaccf94a99f1ba053 SHA-256: c54b0607a5028f24b9551a6cea4162c8c5c7129833844eb62303350e95a93394

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 concatenates information fields to form executable code. An extracted JavaScript file, 'legacy_pdfkit_stage_000.js', was also identified as suspicious by ClamAV with the signature 'Js.Exploit.Shellcode-18'. This suggests the primary function of the PDF is to act as a dropper for malicious JavaScript, which in turn is likely designed to download and execute a further 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0011_000.js` `33571bd67276271c1d19bea8a3a9459a0b18ccbe26760afec0e2fbb9e2eec321`	pdf-javascript-stream	PDF /JS object 11 at offset 0xB28	238 bytes
`legacy_pdfkit_stage_000.js` `5289b4944c784c3be1c13f7592842c82ba1ccf8e14c5a006821f65fe9f9156a4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E7	5755 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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