PDF malware analysis — malicious · c971b62e39cff57f

MALICIOUS

PDF

15.5 KB Created: 2010-01-01 07:27:45 Authoring application: Fexaxououazobb

MD5: 3bae28d8929310e6e2030e64f19bcf68 SHA-1: 463d554635c0a4aca05f750912a1fd093bcaed45 SHA-256: c971b62e39cff57f8520acb9914a1ee9e17f96da3eb91acc8028c70a44604832

318 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The file is a PDF containing multiple JavaScript streams, triggering critical heuristics for CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. ClamAV identified it as Pdf.Dropper.Agent-7303311-0, and an extracted artifact was flagged as Js.Exploit.Shellcode-18. The embedded JavaScript is likely responsible for exploiting these vulnerabilities to download and execute a secondary payload, as indicated by the ClamAV detections.

Heuristics 8

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: Pdf.Dropper.Agent-7303311-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7303311-0
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `9651e5e9010aa94b021e6f1d63bb76b667633950f77b10a83663ba5975d04ea5`	pdf-javascript-stream	PDF /JS object 12 at offset 0x3C1	640 bytes
`javascript_obj0028_001.js` `a55e3ab16eadf767b5e225d469b09792276868b0e0f362572f2168e57ffe68fe`	pdf-javascript-stream	PDF /JS object 28 at offset 0x1B9	922 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `86fbdf8777c3d6f5a2ad1a81e95523ac3bdf1c28bb3ad1ed0ef0e6c21382ec6b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5C8	28653 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 61 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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