PDF malware analysis — malicious · e39f100cd3adcca4

MALICIOUS

PDF

12.6 KB

MD5: 1f4c75068d3723e3825283fc0050875f SHA-1: 105d70f7171a4ab842c26c9ce65a28fe2e28f06c SHA-256: e39f100cd3adcca4af204fb58907fcf306be0591ee710a14dd6e74fb37847f8e

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the use of the Collab.collectEmailInfo method, which is known to be used in PDF exploits. This method is used to construct and execute JavaScript, likely for downloading and executing a secondary payload. The presence of deobfuscated JavaScript files further supports this. The ClamAV detection also confirms the malicious nature of the file.

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` `5529374d5d8d214ef39be08539c7c629eb2bf07f39b40296025da40ce7419008`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12271 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `7ed7b569a36ac66e04a060b1ad20569dd155648f91c0a0b3e1f31d2d0665e254`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5014 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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