PDF malware analysis — malicious · 48f3d1454d433a19

MALICIOUS

PDF

12.0 KB

MD5: 0c3ba01b750898683364d2096b2df6b1 SHA-1: 2fb0c54d06dcd3c7eb4caf0d03e1c17fa6681a52 SHA-256: 48f3d1454d433a194f055e514355cca28be781bbdc1d042fafad7875267ac373

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2007_5659, specifically points to the use of 'collab.collectEmailInfo' to execute JavaScript, which is then deobfuscated into 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. This indicates the file is designed to exploit a PDF vulnerability to run malicious scripts, likely for downloading further stages of malware. 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-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` `8bd2954ab7ff3ec3f08d7ae8f5324aecc6d675f740a5131df4d45eebede7fe25`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12288 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `5938f6d51a195783097c6a594e3929e634989fb17246b24b6f3005cd624eb749`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5106 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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