PDF malware analysis — malicious · fb0bdc47d5b8867b

MALICIOUS

PDF

9.4 KB

MD5: cae9aee993ba3fd9a92d25f99a22ef4d SHA-1: c5c34e7aec6920718ea4c80bddf245b497e66cb2 SHA-256: fb0bdc47d5b8867b366b957152835363671a94ae13ee81568158bdbaa8f4d34d

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript that utilizes the `unescape()` function and exploits CVE-2007-5659 via the `Collab.collectEmailInfo` method. This indicates the document is designed to trigger a known PDF vulnerability, leading to the execution of malicious code. The ClamAV detection further confirms its malicious nature. The deobfuscated JavaScript streams suggest a complex payload delivery mechanism.

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` `3b00cdf3444fdd84d1cb4036d99c36f890044bc30b7c8c5afe093d6a151516f4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12216 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` `30f514beb7f2cf32babeac6c6a6e0bb249ed02a4e28a4374b42b1d70ba9864c9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5142 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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