PDF malware analysis — malicious · fc46a71a31419e81

MALICIOUS

PDF

12.1 KB

MD5: b045eaba641f638b84a52e80d3ef4221 SHA-1: dbe124a062153f6cf8a9c02bba1667067767b064 SHA-256: fc46a71a31419e818ffb2902c33dd30234e70c320fe199f02c4826b05408a1a1

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, specifically triggering the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo method. This JavaScript is further deobfuscated into two files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. The presence of these deobfuscated scripts and the critical heuristic firings strongly suggest that the PDF is designed to exploit this vulnerability to download and execute a secondary payload. The ClamAV detection further supports its malicious nature.

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` `52be1cba5881ca325429012217cdf8fbcaf337449ab46ad5e87225ffdc93b91c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11775 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ca3691df7e6b3ef46418ad33db36003c084e8272727f10dd7b63a6313f538191`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4832 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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