PDF malware analysis — malicious · 7e41333affdf0c16

MALICIOUS

PDF

12.7 KB

MD5: 2d2d2f581a3842a32426cbeeb72ccd8d SHA-1: 824f90afe2fa50f064e50b2ef5bb7e4deed93a17 SHA-256: 7e41333affdf0c16089f57c297392e0acc813bc832b831fb790c185022b7d4d4

80 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, triggered by the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo function. This JavaScript is further obfuscated and split into multiple files, suggesting a multi-stage download and execution process. The presence of 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' indicates a complex, staged payload delivery mechanism, common in PDF-based malware.

Heuristics 4

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)
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` `1847af0a099665b6ac45af66402e56ed64237a1b287618ee3d6643267fda6f35`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	343 bytes
`legacy_pdfkit_stage_000.js` `a987f18d9f64ca869acff4ed0afdce6c8af99448048c88bd40b01588db88eeb0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12437 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `1c9c8e7e2f950edaea0e1043a4d6de754b069a3bc055076e85aaa215bd913763`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5086 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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