PDF malware analysis — malicious · fae5983cb6942419

MALICIOUS

PDF

9.4 KB

MD5: 5ae54d9f743c383adc33a4c9ebe8b641 SHA-1: baf6512a57f040a1a67fae8369fd2f0b5e82dc03 SHA-256: fae5983cb6942419f129879a3c4b9a7e54c60c14c8c76cab5d8bd9981eb9070a

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). The JavaScript is heavily obfuscated and appears to be designed to download and execute a second-stage payload. The ClamAV detection of 'Pdf.Exploit.Agent-35905' further supports its malicious nature. The exact intent of the script is difficult to ascertain due to obfuscation, but it is clearly designed to exploit the PDF reader.

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` `47dfb8902000ec7e6a0eb6011b5e2c0e65237b229b03751f608bc0a707aa44c5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11905 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` `5dbbb835b12e7614baca7f69ca6fe5ca8bc43f55a9c9197db8a2ae17f7e3194a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5039 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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