PDF malware analysis — malicious · f998736e60a4a401

MALICIOUS

PDF

56.2 KB

MD5: 7c17fb764364e21f43d7167e8db23d51 SHA-1: e1e134418d3ce540847a28222a909ce439bb006c SHA-256: f998736e60a4a40114670f461ff315424ba5939ebcd78fcbe03f7703156bcff1

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript that leverages known vulnerabilities (CVE-2009-0927 and CVE-2007-5659) through `Collab.getIcon` and `Collab.collectEmailInfo` functions. The JavaScript is obfuscated using `unescape` and `eval` calls, indicating an attempt to hide malicious code execution. The primary intent appears to be the execution of a second-stage payload, as suggested by the deobfuscated JavaScript stream and the ClamAV detection signature 'Pdf.Exploit.Agent-6808'.

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: Pdf.Exploit.Agent-6808 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-6808
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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` `463be8d73f3ded746daec1fcde60c72af444e7352de8f9e42917a61e0c77f35d`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1F3	373 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `174e663f8c782827aeade4d85e67aacb3526116d2538b27a30755d7ba7824b56`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x39E	11260 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).

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