PDF malware analysis — malicious · d5c608e2e5779356

MALICIOUS

PDF

2.0 KB

MD5: 7d46a365ed53f34ed876792b32b1a014 SHA-1: 9a42064e53057987418b4d7eaf5979c5783bca3f SHA-256: d5c608e2e5779356e89bc3802f30033cc0323b1c415f643680b6aa557dc5923f

218 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1027 Obfuscated Files or Information

The file is a PDF containing obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_UNESCAPE. Specifically, the CVE-2007-5659 heuristic highlights the use of 'Collab.collectEmailInfo' to launch JavaScript. This script is further deobfuscated and contains eval() and unescape() calls, typical of exploit delivery mechanisms. The primary function appears to be executing arbitrary code, likely to download and execute a secondary payload, as suggested by the ClamAV detection as Pdf.Exploit.Agent-35930.

Heuristics 7

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-35930 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35930
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111611_000.js` `f23e505f155bfa9b9f356fa9fddf8d7fcafcc37fc2df3878e575e72c00c819d4`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x6D8	697 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `fa68bb0f37e1eca9efafbbae2ef6a40770ffc0561c8fdf15bf706ce3d2a255ef`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x189	2646 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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