PDF malware analysis — malicious · 929b4a856295bf61

MALICIOUS

PDF

45.8 KB

MD5: 6b60697c30edf71d78b0001dee8ea977 SHA-1: c608aa1ee4e5b05588c9250f50002f2448b9981d SHA-256: 929b4a856295bf61a7889396a670aa3e382c04090bfa020711faa08ada831c7e

136 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: User Execution: Malicious File

The PDF file contains embedded JavaScript that exploits CVE-2009-0927 using a custom Base64 decoder. This JavaScript is designed to download and execute a second-stage payload, indicating a downloader or initial access mechanism. The exploit targets Adobe Reader specifically.

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)
Suspicious extracted artifact high 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `00aaeeaa21cf0f14c98fcef89dfbe77eae33ea2883dabadec34bd80628b87ebc`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9215 bytes
`custom_b64_stage_000.js` `eed62385c027f6320b4b8c03f6034d9c4bdce2a812d603962359424080a519d4`	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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