PDF malware analysis — malicious · bdb254fc6194f871

MALICIOUS

PDF

11.8 KB

MD5: 8f6478087860bd1d5f67115edfa875e4 SHA-1: 07a0e1b7e0347ac05ba174a0498f6a5baa38741b SHA-256: bdb254fc6194f871853409f5b33a7539c7766e0618449aa9eb68985b0bdd8092

118 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, identified by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics. A critical heuristic, 'CVE_2007_5659', indicates the exploitation of a known vulnerability in Adobe Reader. This vulnerability is used to execute a decoded JavaScript stager, which is recovered and analyzed. The stager's purpose is to download and execute a second-stage payload, though the exact nature of the payload is not discernible from the provided evidence. The attack pattern is consistent with a malicious PDF designed to exploit a specific reader vulnerability for initial payload delivery.

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)
Annotation subject callee-key hex JavaScript stager high PDF_ANNOT_SUBJECT_CALLEE_HEX_STAGER

PDF JavaScript uses syncAnnotScan()/getAnnots() to read an indirect annotation /Subject stream, percent-decodes it through marker replacement, then uses a callee.toString()-derived key to decode and eval the final exploit stage.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `83c89bafa116d9c91eff0b9ebda502f5bf0baa04c36fa774c6ebc2756ba3479f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	585 bytes
`annotation_subject_callee_hex_stage_000.js` `cbe2f6ea58e6bbf7a1c54884746507e11c30a9238a8dd62270e76dd1d6e78be7`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5349 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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