PDF malware analysis — malicious · f1844a1a39b06e68

MALICIOUS

PDF

9.1 KB

MD5: 74d9ad153e9632dc4d8c2d2d18eedc4e SHA-1: bdb98a9ae0b5e31d6f13a84b0b2aadeb82b746a1 SHA-256: f1844a1a39b06e686c0620fdfaac0aa60cd7753aaf53bd8915c2dbebce6e5096

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo) to execute code. The JavaScript is heavily obfuscated, but analysis indicates it attempts to download and execute a second-stage payload. The ClamAV detection name 'Pdf.Exploit.Agent-35905' further supports its malicious nature. The attack pattern is consistent with exploiting PDF reader vulnerabilities to deliver further malware.

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` `10dbe62f1f13832e4173f7890f58da1fa749f6703343287dcd99f2bf0eaad4f8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11554 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` `5ef031192acb8a5580e4ebebbcd724b4a8a442eb6e390a72b1824f9e2b1e75e7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4883 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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