PDF malware analysis — malicious · 1d40bdb4d6b70651

MALICIOUS

PDF

12.8 KB

MD5: afc55cf370d2d9e489f6c6f4dc02fd45 SHA-1: d6b422fa1c5c0426e94126b3ec49cd2f11588d03 SHA-256: 1d40bdb4d6b70651b792382877faecd6213dd0961901890ad4d6fb1a6ffde6ba

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 JavaScript function, a known method for exploiting vulnerabilities in older PDF readers. This function is used to execute arbitrary JavaScript, which in this case is likely used to download and execute a secondary payload. The presence of deobfuscated JavaScript files further supports this. The file is detected as Pdf.Exploit.Agent-36062 by ClamAV.

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` `88128a7a137aca670f9c0ad7bec15056cbef319c4d523bf7312f8f6c407bd76a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12607 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `2ca63f9a2882e204dafb3cd7f574365bfc4212238fc11bd6f01f47146902042a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5198 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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