PDF malware analysis — malicious · 3bd2ff035c680a3a

MALICIOUS

PDF

9.5 KB

MD5: 89d04d452520837e84476b1a62403dd7 SHA-1: dc4c0508b65835ee8ad900d4acdab1af39476a3a SHA-256: 3bd2ff035c680a3a80f1e318cfc9d7e2b0f1955f1c8263f801be8c942d23673c

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF containing embedded JavaScript, which is a common delivery mechanism for exploits. The critical heuristic 'CVE_2007_5659: Collab.collectEmailInfo' indicates the exploitation of a known PDF vulnerability. The presence of multiple deobfuscated JavaScript files suggests complex malicious scripting designed to download and execute further stages. The 'unescape()' call and 'PDF_JAVASCRIPT' firings further support the execution of malicious code.

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` `93896afed480deafd3fce71b57f97e98441f8e5c31622cf32301fccff4dfc6f2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12087 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` `afa05f0fc46ed4779ef0e63868de4e5c02fb6ae2c044ab47d7f10727233f8c94`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5101 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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