PDF malware analysis — malicious · c27adf00b7d537ee

MALICIOUS

PDF

12.4 KB

MD5: 9e16c22c922f1e4d837c51378c1b46ed SHA-1: 0fe56c645dee31340ba5b1ed958f07e6c467d516 SHA-256: c27adf00b7d537eecb3917edbe2ce29ae08bc7c1885736f040359607eba6566e

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, which is flagged as malicious by ClamAV. The critical heuristic CVE_2007_5659 indicates the exploitation of a vulnerability related to the Collab.collectEmailInfo JavaScript object, a known method for executing arbitrary code within PDFs. The extracted JavaScript files suggest a multi-stage process, typical of a downloader or initial access exploit.

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` `8551484231949025c0d5da2af5f8e70a81c4189142a12e80904c7b8c14383f08`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12196 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a3b9e5faaabd2a32e9860574aaee370349c4e829902ccf0115394a7ec4d68428`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5071 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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