PDF malware analysis — malicious · efb38ebeebf62621

MALICIOUS

PDF

12.3 KB

MD5: ee91807578085459f630254fb11790d5 SHA-1: 1bee451bff7bb0e32c8a81b9a202c07513a9ca5b SHA-256: efb38ebeebf626213c9fe8b9168c72123d475269334783895034a91ed6fcf05b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, flagged by multiple heuristics, and specifically triggers the CVE-2007-5659 rule due to the use of Collab.collectEmailInfo. This indicates an attempt to exploit a known PDF vulnerability. The presence of deobfuscated JavaScript files suggests the script is designed to download and execute further malicious content, consistent with a multi-stage attack. The ClamAV detection further corroborates the malicious nature of the file.

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` `834d2906300408f3315c8ceebef09c1e2b5d333baa1bfd934ebd54e44872b46b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12095 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `bba45badde6275c0523200af9aabefd589883dde28d66358d85dc6d4e1e6c93f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4970 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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