PDF malware analysis — malicious · 7bebfc274da9ce61

MALICIOUS

PDF

9.4 KB

MD5: 40b2149b2831622d3aabb505c1242c77 SHA-1: 96f06c1ef654b45032b6d3e73dac90960a3cacf6 SHA-256: 7bebfc274da9ce61f84b489c737e86a0262354ceb3f60500355ff5fdb8db08dc

224 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified as a stager for CVE-2007-5659. This JavaScript is responsible for downloading and executing a secondary payload. The ClamAV detection 'Pdf.Dropper.Agent-7275693-0' further supports its malicious nature as a dropper. The primary attack vector is the exploitation of a vulnerability within the PDF reader to achieve arbitrary code execution.

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-7275693-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7275693-0
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.
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.
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)

Extracted artifacts 3

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` `ab6ba3d90d01644d7dfb3a3d74b955432e0e3be8083dce5128e2864ace3f8acb`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14A	5073 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`deobfuscated.js` `49b4999ddc9acfae8cf73c1d8416880403b7032bef38c2d7caf713e4ae072c31`	deobfuscated-js	PDF JavaScript deobfuscation pass	73025 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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