Pdf.Dropper.Agent-7314287-0 PDF malware analysis — malicious · e004fc8791570555

MALICIOUS

PDF

9.5 KB

MD5: edc8606f6159fe351553792eba7f1f38 SHA-1: 13dc17f548233e3def66b9d3352f97999aa2e441 SHA-256: e004fc879157055505a4ab0d3215fcc0a8cf981dd5a3539011ac7e1f3e8079b5

188 Risk Score

Malware Insights

Pdf.Dropper.Agent-7314287-0 · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript that is obfuscated and designed to act as a stager. The critical heuristic 'CVE_2007_5659: Collab.collectEmailInfo' indicates the exploitation of a known vulnerability to execute this JavaScript. The ClamAV detection 'Pdf.Dropper.Agent-7314287-0' further confirms its malicious nature as a dropper. The JavaScript is responsible for downloading and executing a second-stage payload, as suggested by the stager nature of the embedded script.

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-7314287-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7314287-0
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` `b9a85ee399db318b3ad68d0755effe289a645a7404fad2094712c8a3fd042920`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	244 bytes
`annotation_subject_callee_hex_stage_000.js` `4ef48519ddbd33616b35a0dd53cf0f3dde30c51db50009fab03976dcfd434615`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14A	5070 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` `21dba2b6655b90582ea6ebdc3b7c318feb17da84cfc512ab009cb3adb07f733d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2CA	12077 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` `136a7b248811155e5bb0dd91bcc1dc848e840bc7710cb6f324acc58d7e6f1ba1`	deobfuscated-js	PDF JavaScript deobfuscation pass	43461 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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