PDF malware analysis — malicious · 583074b00481cf4d

MALICIOUS

PDF

11.7 KB

MD5: 26d0ddc3920a4cb6a79a9e2712936059 SHA-1: 87797f05a4edacc1e6b723b6d5603d354dd6f102 SHA-256: 583074b00481cf4db445c089f9e7fa4820a930a23f0f3615ee5e52541548e7e8

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including CVE-2007-5659. The JavaScript is further obfuscated and split into multiple files, suggesting an attempt to evade detection. The primary function appears to be the execution of this JavaScript, which likely downloads and executes a second-stage payload. The specific exploit used is identified as CVE-2007-5659, related to the Collab.collectEmailInfo method.

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` `4a9edf15efede0433a6de86a05c720a310886366e35745502216139a199dca16`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11971 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `8f38319efee2100db7d351e22470a2e650013bae05d9287140f80233077edd4b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4864 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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