PDF malware analysis — malicious · ab5ed6b2705e6e07

MALICIOUS

PDF

45.8 KB

MD5: ae6edce41b3d7d7431b82229519ef763 SHA-1: dd69ac07177de4dc6991934e52fd184d0293e241 SHA-256: ab5ed6b2705e6e079c3bb49304c3060a8319a8674301898b066f51d913a549d0

98 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript that utilizes a custom Base64 decoder to deobfuscate and execute a malicious payload. The critical heuristic firing indicates exploitation of CVE-2009-0927 via the Collab.getIcon method, a known vulnerability in Adobe Reader. The deobfuscated JavaScript is likely responsible for downloading and executing a further stage of the attack.

Heuristics 5

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)
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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_obj0008_000.js` `91af3c82b0ffa9a503df9de822bb56ac065b8fed573fac8f483d409006c24223`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9215 bytes
`custom_b64_stage_000.js` `38f5b06d2a34c03ff09ea0642d310e3b1d0c65d3934b5014904d27a4893d57ec`	deobfuscated-js	custom Base64 decoded JavaScript layer 2 (PDF /JS object 8) at offset 0x8A7	1517 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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