PDF malware analysis — malicious · f98c875e598fe5b6

MALICIOUS

PDF

3.6 KB Created: 2010-02-12 08:31:34 Authoring application: a416b5

MD5: 5cb3a19a50d85cae03a65cfb96f17d97 SHA-1: 8107a38776c4495b403658ef3112c9b49d81a236 SHA-256: f98c875e598fe5b6fe90f403464321b4130c6f88a2ec5d3580c5daf3153f046f

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659 through embedded JavaScript. An extracted JavaScript file, 'legacy_pdfkit_stage_000.js', was also flagged as suspicious by ClamAV with the signature 'Js.Exploit.Shellcode-18'. This suggests the PDF is designed to exploit these vulnerabilities to download and execute a secondary 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` `4f4af8359940f1aa8745b6dc5a12d65310ca7f53712ec88e61a6a31fac54fc29`	pdf-javascript-stream	PDF /JS object 11 at offset 0xCB	595 bytes
`legacy_pdfkit_stage_000.js` `c745f796c3e2995cc11ed01928bf3bffb02b733ef4f9f2b53082ec16a070da63`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x3B9	6296 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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