PDF malware analysis — malicious · ff2ca90c19ebbbaa

MALICIOUS

PDF

9.6 KB

MD5: 04bc9280d4eec912b0bd2abc446194ff SHA-1: bb483b0d76787fe3473895ef73042142f5222df1 SHA-256: ff2ca90c19ebbbaab77f93990ff62b69793db5b98cea791b2e36a66aca85303c

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1559.001 Component Object Model T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2007_5659 heuristic specifically points to the exploitation of a known vulnerability using the Collab.collectEmailInfo method, which involves decoding and evaluating JavaScript. This suggests the file is designed to leverage this exploit to achieve its malicious objective. No specific malware family was identified, but the exploit mechanism is clear.

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` `976f9ea8b13839ab1bc54eeb10b00d0f040f211507954660adef31e29897349e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12296 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` `3a50ef74c50ba79585856e74e87638876dd3b90603d76f6be6865c609490cb34`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5025 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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