PDF malware analysis — malicious · a571453ddaf9a427

MALICIOUS

PDF

12.0 KB

MD5: cc0a5493558847ce345ae2dccce142e6 SHA-1: e70510c0421cf4e55d6b61e942dec73d527b3034 SHA-256: a571453ddaf9a42750790dded1012973af6b4d48103850a296d2206d37fa398d

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 the exploitation of a known PDF vulnerability using JavaScript. The presence of deobfuscated JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, suggests a multi-stage attack. The primary function of the embedded scripts is likely to download and execute a secondary payload, as indicated by the ClamAV detection of Pdf.Exploit.Agent-36065.

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` `d5fba84b84e837f0603e95b68caf4bede42e3fbbc19433d2876d9513b20a11d7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12245 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `97bfa53b46f9caff0a024592fd42a0ccdf077dee0c16d2bcb781be8ec1fae5de`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5067 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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