PDF malware analysis — malicious · db3221e14fd57295

MALICIOUS

PDF

11.6 KB

MD5: b2d13a7dfc94999e94c0540c7f2d4283 SHA-1: 69964bcbb99cdc8f799802a0ce1bdbdb1f862c9b SHA-256: db3221e14fd5729512c9968357d05a2e0ca89b5e722307dc7c77ff95925bdd32

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The critical heuristic firing for CVE-2007-5659 indicates the exploitation of a known vulnerability in Adobe Reader via the `collab.collectEmailInfo` JavaScript function. The embedded JavaScript streams, particularly `legacy_pdfkit_stage_000.js` and `legacy_pdfkit_stage_001.js`, are likely responsible for further stages of the attack, such as downloading and executing additional malicious content. The ClamAV detection further corroborates the malicious nature of the file.

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` `5b2629633260d01690b545e46bc921581948510fc7ab2bcdc2ffbb9a52d9fb82`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11898 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `af2d7efc683ef87d1eee85c3a8283fe07daf8839d4168b64a7352cbf0eb60fcf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4871 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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