PDF malware analysis — malicious · 54ae866850a5856a

MALICIOUS

PDF

8.2 KB

MD5: b4f52489703dbecefeb2d671e940fa40 SHA-1: 2cac523cf25e00aa74df08d52820a6c26719a0bc SHA-256: 54ae866850a5856a0f5cd6aa3fda687d89246991cdc74e14432b1a2ba3db84bb

218 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes the 'unescape' and 'eval' functions, indicating obfuscation. A critical heuristic identified the CVE-2009-0927 exploit targeting the 'Collab.getIcon' API, which is a known method for executing arbitrary JavaScript within Adobe Reader. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the ClamAV detection and the presence of deobfuscated JavaScript artifacts.

Heuristics 7

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)
ClamAV: Pdf.Tool.HeapSprayHeuristic-6316003-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Tool.HeapSprayHeuristic-6316003-1
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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_obj0009_000.js` `c1c376cb974743de20a7e631689c0accf3eb985ae93b8deec1bbc53eb911330b`	pdf-javascript-stream	PDF /JS object 9 at offset 0x476	6815 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `e02e2a3bae5c73bf215cd72464cd0cd24899c02b4725be7065c7303db8f7b64c`	deobfuscated-js	string-concatenation normalized Acrobat API aliases at offset 0x476	276 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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