PDF malware analysis — malicious · c8fe9a0147091fb1

MALICIOUS

PDF

5.3 KB Created: 2010-02-13 12:39:48 Authoring application: a2f631

MD5: df8af1bd0a05907e73e92ae9d8ab39a7 SHA-1: 5e132bd7ab77216fd87508743d19dc000bf52f99 SHA-256: c8fe9a0147091fb1024534a79ed17031df75ee2f75bb40d701c25d45d7aaff0b

258 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript/JScript T1059.007 JavaScript/JScript

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE_2009_0927, and CVE_2007_5659. These vulnerabilities are associated with the execution of embedded JavaScript. An extracted JavaScript file, legacy_pdfkit_stage_000.js, was detected by ClamAV as Js.Exploit.Shellcode-18, suggesting it contains shellcode or exploit code. The embedded JavaScript is likely responsible for downloading and executing a second-stage 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_obj0014_000.js` `b4d99ed8ee9e2f3d80fa28b699fbef34c8d37bb660e69d2bbfe7c6684dc948e4`	pdf-javascript-stream	PDF /JS object 14 at offset 0x1B8	393 bytes
`legacy_pdfkit_stage_000.js` `bf02559a706a2e8af26ac7530e6cb47bad1245831a4c7498401b5adb0e15216b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x3EC	7522 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 18 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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