PDF malware analysis — malicious · f87d595b8c57fc2b

MALICIOUS

PDF

5.4 KB Created: 2010-02-12 04:55:30 Authoring application: a93abd

MD5: 3a12f3295a05f5cd58733f64e5640360 SHA-1: 5ba61dec2b25d60505c02a31da4f25a9461831e3 SHA-256: f87d595b8c57fc2bc8f42d16eaf7825d7ecabab3f0dd3aa0fbab3d514b10b554

258 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 deobfuscated file named 'legacy_pdfkit_stage_000.js'. This script is likely responsible for downloading and executing a second-stage payload. The presence of ClamAV detection on an extracted artifact (Js.Exploit.Shellcode-18) reinforces the malicious nature of the embedded script.

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` `1787d9898d1e7475dff81ccea1b73218dbc7a38ca02d831fb5945079c0771c61`	pdf-javascript-stream	PDF /JS object 14 at offset 0x1B8	416 bytes
`legacy_pdfkit_stage_000.js` `34d273a002df91e35c6685c993584e714f04dfa22529847450cf434f99b83ebb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x3FC	7627 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 14 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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