PDF malware analysis — malicious · fbb1d94395d83be3

MALICIOUS

PDF

11.6 KB

MD5: a48c166bfaa97eaa99ac8f30b43da502 SHA-1: d3aca50e59e6199c2ace57471659a54e5ceaa2f7 SHA-256: fbb1d94395d83be3a181ee49b7252a5a9ea59c8af7ab4e546a9547e314e6bdf4

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript, specifically triggering the CVE-2007-5659 vulnerability via the 'collab.collectEmailInfo' method. This method is known to be used to execute arbitrary JavaScript within the PDF viewer. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') indicates a multi-stage attack, where the initial PDF likely downloads and executes further malicious code. The ClamAV detection 'Pdf.Exploit.Agent-36065' further corroborates 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-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` `b2c90d096ad02878067e8cab202169d82316013743712379ccc330e58bdf97f1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12008 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `83abd268ebacb71e46e5921f9dd88889ebaac498a356032093bf67cc55266112`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4917 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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