PDF malware analysis — malicious · d5f83a8437da416b

MALICIOUS

PDF

11.7 KB

MD5: 26b876b2e920b05fcdcb1488c852d491 SHA-1: 04b0ad9f67e46ee495b34adee3b34872fedf233d SHA-256: d5f83a8437da416b7b0e87833fefcacf1f4a7be33c2031402c3826d0ae983039

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2007_5659 heuristic indicates the use of a specific exploit targeting the Collab.collectEmailInfo function, which is known to execute JavaScript. This JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the extracted JavaScript files and the ClamAV detection. The obfuscated nature of the JavaScript and the presence of multiple extracted JS files point towards a multi-stage attack.

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` `bdb3c8486eed3dc500c17ad270c9f4da9b77d41661f52a97a6b6d1f49d29a0f1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11941 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `748bd595e115d09b4db0085b0fb302ffeb2860f0a3e2eda9e14ffcc34b20b65f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4915 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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