PDF malware analysis — malicious · b46a32fc7ca2fec0

MALICIOUS

PDF

12.4 KB

MD5: 105276caccc2703fb82a82c9858a980c SHA-1: d4bc5a6ea4a21dace1683f36be3d360b771e2c96 SHA-256: b46a32fc7ca2fec0a91f61982a9032c7ec8e78b952f4008f966a5aeff90d33e4

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability, specifically targeting the Collab.collectEmailInfo function. This JavaScript is further obfuscated and split into multiple files, indicating a multi-stage loading process. The presence of 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' suggests the use of a known PDF exploitation kit. The primary intent appears to be the execution of arbitrary code, likely leading to the download and execution of a second-stage payload.

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` `79f1b94745cfa93552d290e20693e7abc26addbfbf393d7708f13c81879b0517`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12118 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `78bd1e16c5937c32322b88edf7212b5048e772f7ffb13fb6d8cacea5284900a6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4961 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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