PDF malware analysis — malicious · b3bc720e53cd56f6

MALICIOUS

PDF

3.5 KB

MD5: f9439b9d67080dc9e233b3a8d0c6be51 SHA-1: a837dc1548710e61a9661fd0a5686d758d3b0a85 SHA-256: b3bc720e53cd56f60aeac8dcd4a4646867fe35fd9edcaf7af7c2baea6de6590e

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes `eval()` and `unescape()` functions, indicating obfuscation. Critical heuristics identify the use of `Collab.getIcon` (CVE-2009-0927) and `Collab.collectEmailInfo` (CVE-2007-5659), which are known vulnerabilities in PDF parsers. The deobfuscated JavaScript stream suggests the execution of malicious code, likely for downloading and executing a secondary payload. The presence of obfuscated JavaScript and exploitation of known PDF vulnerabilities strongly points to a malicious document designed for exploitation.

Heuristics 8

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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_obj0004_000.js` `00175fa36f1c0f53dfd161da930e913d0930f0f69eea8bccf1f5149c4ba8f2f1`	pdf-javascript-stream	PDF /JS object 4 at offset 0x249	29211 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `7978c378fa89c0202541fc90d29b1fda510af756a93811327c5b8c3cda858f96`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x2B2	6569 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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