PDF malware analysis — malicious · ca7c5dea45135f52

MALICIOUS

PDF

9.1 KB

MD5: 26c612412b5b16e469d5bcbb575b808f SHA-1: e101fd0abce9f55a52d807212aad223090cf8193 SHA-256: ca7c5dea45135f52d6a6d6e7466f605e944fcf897ac7f1813828f1e203c4502f

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript that is obfuscated and utilizes the unescape() function, indicating malicious intent. Critical heuristics confirm the presence of an exploit targeting CVE-2007-5659 via the Collab.collectEmailInfo method, which is known to be used for launching JavaScript actions. ClamAV also identified this as Pdf.Exploit.Agent-35905. The extracted JavaScript streams suggest the execution of further malicious code.

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` `1c00e6e37e2e7d1156e3fb05209129318a27dac29126a69cdf6eda6675f258db`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11571 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` `6e187d962852a93b843005e1bb3d3826a841710ade8192b2e2e9a8ec1dce1da9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4825 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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