PDF malware analysis — malicious · da18bccaf1bf7c11

MALICIOUS

PDF

12.0 KB

MD5: f200e359ddbd63800542b9e43bebfa72 SHA-1: 8a1a9d0b39526ccfd42a6e3bab3d25a67fec340e SHA-256: da18bccaf1bf7c11c0a53b3b46cf43094135299993e04113b2a4ee1983a85449

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, specifically identified as a stager exploiting CVE-2007-5659 via the Collab.collectEmailInfo method. This stager decodes and executes further JavaScript, indicated by the 'annotation_subject_callee_hex_stage_000.js' artifact. The primary intent appears to be the execution of a second-stage payload through this obfuscated JavaScript chain. ClamAV also detected this file as Pdf.Exploit.Agent-36179.

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-36179 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36179
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` `e89d7054d228dd0d7d4de9a02d1607a443ba297f326673115b5825c1b6cb184a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	823 bytes
`annotation_subject_callee_hex_stage_000.js` `e9748740bfbf14e6e8cced3d2b74101eb6319909a58f8ab2d9c5e78c6158008e`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5235 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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