PDF malware analysis — malicious · 37bf1c8aa5b2b0f3

MALICIOUS

PDF

12.8 KB

MD5: 0b73472ea580a99ea1ca3e9444399a70 SHA-1: 09daab5289327054c125a6770352c2aafd2e402a SHA-256: 37bf1c8aa5b2b0f348457722ea947e402b046c28de0899dcc40a432a36e73591

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, flagged by multiple heuristics, including a critical alert for CVE-2007-5659 related to the 'collab.collectEmailInfo' function. This function is known to be used in exploits that execute arbitrary JavaScript. The deobfuscated JavaScript files suggest a multi-stage process, with the initial exploit likely downloading and executing further stages. The presence of 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' indicates a sophisticated dropper mechanism.

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` `bea682610d7b5559e97e6a7ef76be42978ad25735d1b703547b65aebbd763c89`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12577 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `6ca9d280d56a2976ecaec98b521359f7891bb7463110f1eb5e1bcccc36ed41bb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5182 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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