PDF malware analysis — malicious · 1ba8c10eff36c194

MALICIOUS

PDF

12.6 KB

MD5: 66a0e528cbe8d9995a9990ca78a2c06b SHA-1: b8ccffa97fb5ce7ecb9fcb039fdd56643d178105 SHA-256: 1ba8c10eff36c194590d304ab88b684ed55c7e822fd958c5c35d9733db3e11ca

156 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). This script acts as a stager, decoding and executing a second, larger obfuscated JavaScript payload. The exact intent of the second stage is unclear due to obfuscation, but it is highly likely to download and execute a further payload. The presence of multiple JavaScript streams and the specific CVE exploit indicate a malicious document designed 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.
Suspicious extracted artifact high 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `8b08bba40e9a16cde617de6072446845fefe9fbe16451f4e6770ea400933f9fc`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	739 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`annotation_subject_callee_hex_stage_000.js` `b1c7e385e918f622e854a917d5c9121caa5bd3fa2016bd5ba471cbe56dcb53dc`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5105 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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