PDF malware analysis — malicious · b63b53559ebbdbd5

MALICIOUS

PDF

11.9 KB

MD5: a6ef03a863da09332faa9246c42d1fa9 SHA-1: 09cd03514d2b135e37977f02ddf8a9ee6ccc729a SHA-256: b63b53559ebbdbd55428b3042ff6acdefb641e1e2ff5c81c3c0cdc7c87df983f

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The file is a PDF containing embedded JavaScript, which is flagged by multiple heuristics as malicious. Specifically, the CVE-2007-5659 exploit targeting Collab.collectEmailInfo is present, indicating an attempt to execute arbitrary code. The presence of deobfuscated JavaScript files suggests the execution of a secondary payload, likely a downloader.

Heuristics 5

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `5c80be6a2675106fb0f13d9c3bb1dc7f7f344761dbd34f203d6b2fdd30c91db0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11746 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `3ee372a59a63189a5d80f643a68f609b04f4dac3d0d6be67f767b9ab214387f2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4799 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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