PDF malware analysis — malicious · 8017410683f9cf5a

MALICIOUS

PDF

11.7 KB

MD5: 6507be136e0aaecfd964fb9718383133 SHA-1: 21f4742ddbb9ee47265d37482279748c60e2acfb SHA-256: 8017410683f9cf5a4394fa69b80f5ac82784890f6a4bc77e52e5b9f2ede44240

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that is obfuscated and designed to be executed as a stager. The critical heuristic CVE_2007_5659 indicates the exploitation of a known vulnerability in Adobe Reader (Collab.collectEmailInfo) to achieve code execution. The embedded JavaScript, specifically 'annotation_subject_callee_hex_stage_000.js', is recovered and appears to be a hex-decoded stager, likely responsible for downloading and executing a further payload. The ClamAV detection further confirms the malicious nature of the file.

Heuristics 6

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-36180 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36180
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` `17e11d5c0e7abf0d400044cf4333a75f193b35e2745d65fea155eb4de3ce3aa6`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	628 bytes
`annotation_subject_callee_hex_stage_000.js` `5591a5f46ad3a253b5adb15662c2cc62d1fb31a7a7abd0d543e4665323847208`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5135 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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