PDF malware analysis — malicious · 366de0d3dec48163

MALICIOUS

PDF

3.6 KB Created: 2010-02-12 07:45:26 Authoring application: c7c85c5ac

MD5: c64f0ca93c94c82c2f6d9b4b8703a61b SHA-1: c88182ce27c2507e39e7c7a0e97e3f0364549311 SHA-256: 366de0d3dec48163be61bb0ac1ae82646152cbb64a9f20deabde0c95d2bfcabf

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. Heuristics indicate that the PDF launcher concatenates info fields, extracts characters at a fixed stride, and evaluates the result. An extracted artifact, legacy_pdfkit_stage_000.js, was detected by ClamAV as Js.Exploit.Shellcode-18. This suggests the script is designed to download and execute 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_obj0011_000.js` `fe92aaccf4e342583d64e6f06f76bd3affa8e4f726e28d30631a8dad319f3069`	pdf-javascript-stream	PDF /JS object 11 at offset 0xB1C	550 bytes
`legacy_pdfkit_stage_000.js` `8af5a1efa4695ad68bdb0ac7e7ea969cb109717587d8c7fb696df2ba09fef30e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E1	5750 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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