PDF malware analysis — malicious · c092c906e7d9ae72

MALICIOUS

PDF

12.2 KB

MD5: e5d540738a7beee28e045acc8878ace7 SHA-1: a5ab32ad5820197e4b0551c003ba2f43b4f7168d SHA-256: c092c906e7d9ae7290e85aa995ffd4976ca2a1832263c4245942e59e2b11e1c5

186 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains multiple embedded JavaScript streams and is flagged for exploiting CVE-2007-5659 via the Collab.collectEmailInfo method. The critical heuristic 'CVE_2007_5659' indicates that the PDF launcher uses a hex decoder on an annotation subject payload before evaluating it with JavaScript. This suggests the primary function is to download and execute a second-stage payload, likely through the deobfuscated JavaScript files found. The ClamAV detection further confirms its malicious nature.

Heuristics 7

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-36063 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36063
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.
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed stream)
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `eb39e2de4dbbc100de6d3e30aa43ff78fa075618862ba1ebba5151ea3a3b848d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	273 bytes
`annotation_subject_callee_hex_stage_000.js` `72b6f98815d4effc28d015f462a53595ab9941456537423024d5410b4f78e8a6`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14A	5172 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `a6b4034cf6b30fc2afc0cb47e8c2a2f5f62769d5e6b84c0f893c44f5f671cf8b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2D6	12393 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`deobfuscated.js` `83da581d9a018584d304fc7029dbd0c9f82203131d1837e7fb66b136eeb9f7fd`	deobfuscated-js	PDF JavaScript deobfuscation pass	72826 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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