PDF malware analysis — malicious · ba8b3e13d5715051

MALICIOUS

PDF

12.2 KB

MD5: 6b1aa78e51337d76f048ca24b9741b56 SHA-1: f37b4094f2d299d2e38788f53b4cee26076667c1 SHA-256: ba8b3e13d5715051befb6675e850a44a5c185ac925d55b23a625665eb08d350d

216 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'. A critical heuristic, 'CVE_2007_5659', indicates the exploitation of a known PDF vulnerability (Collab.collectEmailInfo) to execute a JavaScript stager. This stager is further described as a hex-encoded payload that is decoded and evaluated. The presence of 'annotation_subject_callee_hex_stager' and the extracted 'annotation_subject_callee_hex_stage_000.js' file confirm the use of a JavaScript stager. The ClamAV detection 'Pdf.Exploit.Agent-36179' further corroborates the malicious nature of the file. The script likely downloads and executes a second-stage payload.

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.
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` `e89d7054d228dd0d7d4de9a02d1607a443ba297f326673115b5825c1b6cb184a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	823 bytes
`annotation_subject_callee_hex_stage_000.js` `2986d99fef2d49aa0d91c7300aae2de77ba5afaadc22a76e3886d7468828860c`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.