PDF malware analysis — malicious · f33e4d73931eea85

MALICIOUS

PDF

9.2 KB

MD5: d0c350b3f9bb7c735bccca821f89fa3b SHA-1: d637d50db95c1091027200a97e8cd63ed8e44183 SHA-256: f33e4d73931eea85f67cce765aa694d84d57c0ac13e37d97158e8c107a860f80

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link T1059.007 JavaScript

The file is a PDF containing embedded JavaScript, which is used to exploit CVE-2007-5659 via the Collab.collectEmailInfo method. The JavaScript is heavily obfuscated but appears to be designed to download and execute a second-stage payload. ClamAV also identified this as Pdf.Exploit.Agent-35905, further indicating its malicious nature.

Heuristics 6

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-35905 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35905
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` `d8a6b4ad1abf04d0c4a4f89535cfb57f7312edef25c443f4e844c8ec9d0929dd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	352 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` `bc18b3211c75c39f6afdf6bc7ca3ae2a7ddd2bd6993f59239a6c53bd9c71c7ae`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11738 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` `66888a1089b5bba07d49fb670365c1148e063d4c00e634c1d72848a5ccd98bec`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4904 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.