Pdf.Dropper.Agent-7252267-0 PDF malware analysis — malicious · 3d3152516918ad79

MALICIOUS

PDF

9.6 KB

MD5: 97dde11523da5ea83e9ee227df777a08 SHA-1: 3878720d01fd10e6e5fdc85a1d4a6138255e8066 SHA-256: 3d3152516918ad79dbc94a442d051e0b0c1b3c2d79e5dd8d6cd526e8b9d512ab

186 Risk Score

Malware Insights

Pdf.Dropper.Agent-7252267-0 · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, triggered by the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). This JavaScript is heavily obfuscated but appears to function as a stager, likely downloading and executing a second-stage payload. The ClamAV detection name 'Pdf.Dropper.Agent-7252267-0' further supports its role as a dropper. The presence of multiple deobfuscated JavaScript files indicates a complex, multi-stage execution process.

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.Dropper.Agent-7252267-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7252267-0
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` `11b03694c4e705ab29873cc5e2c55342ee498b376ac2dc5f05ce17018ef44c38`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	264 bytes
`annotation_subject_callee_hex_stage_000.js` `022ab220f4581138994b943978f94f8ebfbc62f83fdb3c0a22618862b163da6f`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14A	5192 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` `764ef5b45dbd7a80b22dfe7c9430902a82b7ecd2e02a31eae200a2d2bd39d620`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2CC	12341 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` `27a9919c1258b61f4c828b592f6b7ea9499f898517f32ca65cfc40c47087fc72`	deobfuscated-js	PDF JavaScript deobfuscation pass	72421 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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