PDF malware analysis — malicious · 3b0144f96187a335

MALICIOUS

PDF

MD5: ae8be3677bd1db5e837d129de37c1523 SHA-1: a722de41b5e76d69ac8fa1140727e7849065fd55 SHA-256: 3b0144f96187a3350b136dfc700bc86b0eda971c267d8092ba9035af3881eb66

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). This JavaScript is heavily obfuscated but appears to be designed to download and execute additional malicious content. The presence of multiple deobfuscated JavaScript files further supports the conclusion that this is a multi-stage attack. The specific intent of the scripts is to exploit the PDF reader and likely download a second-stage payload.

Heuristics 5

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)
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `62c505e1d1bb7d29ac9875f9171a52159575cc07ce9cfe7007d40a867ffa3b8d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x277	683 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `c454b74568d308192d2cbc7a68f2e314280369364f039cebd3ac86e97ad71a2e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x44C	11437 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `26c72576ebbe8c4527c8158694df9934115c567e45f017b2cee785581557af4c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x44C	4761 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.