PDF malware analysis — malicious · 88e00036ce3b4a6c

MALICIOUS

PDF

11.6 KB

MD5: af4954beb7029fc5ec3ceb360794b786 SHA-1: 073774a292f12fab43b88d1b8f7dab3503590ea5 SHA-256: 88e00036ce3b4a6c70baf728cb8b3656280bb8553b682531d34c1b1cc5d3ef00

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates a known exploit targeting Adobe Reader's `Collab.collectEmailInfo` function, which is used to launch JavaScript. The presence of deobfuscated JavaScript files (`legacy_pdfkit_stage_000.js` and `legacy_pdfkit_stage_001.js`) suggests the script is designed to download and execute a secondary payload. ClamAV also detected this as `Pdf.Exploit.Agent-36065`, further confirming its malicious nature.

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-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `1f31d179fd505d9cc42b1eea4e40f8fb5b1e3b720135b9f3508af62d7856b923`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11937 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `9199d184a9e4055f8ade51e3dffbe1541233f95ae482f9d9d3a141e3031b7663`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4893 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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