PDF malware analysis — malicious · dcbf3cec102c9dc1

MALICIOUS

PDF

9.4 KB

MD5: 3514a0248c7d97635664d769d44edb56 SHA-1: 9ac90ebb13eea0408cff5367dbbd157a2f3ef783 SHA-256: dcbf3cec102c9dc1c8bf8aa0f93f696588a225b3002d696ac27ba8b45893a7c4

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious Link/URL

The file is a PDF containing embedded JavaScript, which is a common delivery mechanism for exploits. The critical heuristic 'CVE_2007_5659: Collab.collectEmailInfo' indicates the use of a known vulnerability to launch scripts. The embedded JavaScript streams, particularly the deobfuscated ones, likely contain code to download and execute further stages of malware. The ClamAV detection further confirms 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` `bd5a3bca72f7542dc0e43d6b738013b5854e3dfa3bc474d195ce5bb881ec6157`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12014 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` `b0b40d724787f9bb9c38ad090cf21b8923d4ed2d7f7c55b2c8f0cbb486495c4b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5063 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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