PDF malware analysis — malicious · 57103ed15f3bf149

MALICIOUS

PDF

11.9 KB

MD5: 3145149d361eac371ad7269f0c7ffefd SHA-1: f960e7cd2c22919140cd145bb5a03bd765f0e7c1 SHA-256: 57103ed15f3bf149a869f97f79af0dad9964d978e23fffaf40bc7a0342d2c191

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV. Heuristics indicate the use of CVE-2007-5659, specifically the 'Collab.collectEmailInfo' function, which is used to launch JavaScript. This JavaScript is likely responsible for exploiting the PDF reader to download and execute 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-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` `b2d76e51d812d281f96c211b0df8cc1f1edd003f035705cb83e6bcba07104723`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12152 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `29a84c22c270db6f245d066686dfc8d443c67bc672b64e3189219590d175ffde`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5042 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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