PDF malware analysis — malicious · 1bc1aebd5148a403

MALICIOUS

PDF

13.0 KB

MD5: a07a710514910ce74959bfff8ffe269b SHA-1: c2f91e036cbbb5a97c53d3505b5d2b19f73ce82c SHA-256: 1bc1aebd5148a40346c15ed05a58cec9cb48e796ef61ec5dd4c68768c515978b

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits the Collab.collectEmailInfo vulnerability (CVE-2007-5659). The embedded JavaScript streams, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are indicative of a multi-stage exploit. The primary function of the JavaScript is to download and execute a second-stage payload, as suggested by the heuristic firings and the nature of the exploit.

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` `8c7c4242bd2d9ed00452dae026540511fb077b7494b62bc76b75e66db4f63ace`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12723 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ecf6549a7adf1dbdaa0f20bc7a24c503e42c1c6cc2f32630902f0773bb2faed0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5299 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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