PDF malware analysis — malicious · cac4b10ffe0756c6

MALICIOUS

PDF

9.3 KB

MD5: 3fac11c67e8582ebb6083aeef48f90cc SHA-1: 8d5756aaf3e317e6ee81eaa4d8daa2439d5dc6a8 SHA-256: cac4b10ffe0756c6024e8e61613612fecb049c0b23834a45fa2a20579f0c352b

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF containing embedded JavaScript, which is flagged as malicious by ClamAV (Pdf.Exploit.Agent-35905). The critical heuristic CVE_2007_5659 indicates the use of a known exploit targeting the Collab.collectEmailInfo function. The embedded JavaScript is heavily obfuscated and likely responsible for downloading and executing a second-stage payload. The PDF launcher concatenates info fields and extracts characters at a fixed stride, then evaluates the result, which is a common technique for exploiting PDF vulnerabilities.

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` `bd89082cb4226c5a5aa7705aed290435d7388cd124da07b52ffc51eba7b30413`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11912 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` `d9311eb9c688be9f14ae7a5f297a0094bdf2853e8acf819554a68901354d03ad`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4999 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.