PDF malware analysis — malicious · a711cd8e59163932

MALICIOUS

PDF

11.8 KB

MD5: 11641c0c2a9c645a6bd6186deff6464b SHA-1: bbd2abf765a431c9585b1b6ad9e6d150bbf660f0 SHA-256: a711cd8e5916393264d8b9704a43560b63d1ad158926c91de0bfa00e490faa8d

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified by multiple heuristics as malicious. Specifically, the CVE-2007-5659 heuristic indicates the exploitation of a known vulnerability using the 'collab.collectEmailInfo' function to execute JavaScript. The presence of deobfuscated JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', further supports the malicious nature. The script's likely intent is to download and execute a second-stage payload, although the exact mechanism is obscured.

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` `0c8d399aae7436faf420eed91e886843cabcad5154c19aea8afd96f2a6fbcf6c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12167 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `e0a1a919af9b986a0c6b8f04c637fbcb5fa31fad5a3b705729c1b6162eda9050`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4972 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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