PDF malware analysis — malicious · 2e925ec739d5792a

MALICIOUS

PDF

9.4 KB

MD5: 7e3f305182384295272cea767e5cd11f SHA-1: 1dd063cd59a8be0638a99fc3a2c528739ce701ec SHA-256: 2e925ec739d5792aaf63ce48edd1ed43b3088579c780b9b4e81b60733e694a9a

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The sample is a PDF file that contains embedded JavaScript, triggering critical heuristics for CVE-2007-5659 (Collab.collectEmailInfo). The JavaScript is obfuscated and uses unescape() calls, indicating an attempt to hide malicious code. The primary function of the script appears to be exploiting this CVE to download and execute a second-stage payload, as suggested by the ClamAV detection name 'Pdf.Exploit.Agent-35905'.

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` `e63bbfc2dd26176a257f54f6fe9825ef4a14858e21a8e4c6c0f11e2f76b2825d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11978 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` `2b78accae8af734bfcd44efc8ce0da7e1ba3614bfa6fbea196bb652ec29c35ca`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5061 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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