PDF malware analysis — malicious · bed640c900e2b6b2

MALICIOUS

PDF

12.7 KB

MD5: 2c3399b9693ae275185391b7d2df0bbe SHA-1: 9d471790c59c4f7014224b38e56e24cb04309ab7 SHA-256: bed640c900e2b6b23e075b8299e284c03558fd23371c64066277e9f2bbb75fbb

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical heuristic CVE_2007_5659 indicates the PDF exploits a vulnerability using JavaScript. The embedded JavaScript streams, particularly legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are indicative of a multi-stage downloader. The ClamAV detection further confirms the malicious nature of the file. The overall pattern suggests a PDF-based exploit designed to download and execute further malicious content.

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` `0b1ee8e03d6dedbbc8636f47ee68e6b1e04de7864963027c198e396b831723b7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12422 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `23bb73c3a4cf14cb6eb86e8e8ea55ea55c8c9045766d72e6d9a8d4f6f41dbc94`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5091 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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