PDF malware analysis — malicious · 7e10bb79db6d3774

MALICIOUS

PDF

9.3 KB

MD5: 15a23b66fa8921f014d8f97583b7c684 SHA-1: d7285ae25504db28e48ef6cf83b22fc1378de89c SHA-256: 7e10bb79db6d3774eee03f30f6d5f551addaed3d8e17ee08ea485a769da62cc3

186 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, triggered by the CVE-2007-5659 vulnerability via the 'collab.collectEmailInfo' method. The critical heuristic 'PDF_ANNOT_SUBJECT_CALLEE_HEX_STAGER' indicates that this JavaScript is used as a stager. The presence of large deobfuscated JavaScript files suggests complex malicious code execution. The primary attack vector appears to be exploiting a known PDF vulnerability to run arbitrary code.

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-13397 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-13397
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `9f17df95bc71874fe0f2dcb9f0e8f529cdb3604910d27079f2fbde52cabda2a8`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	256 bytes
`annotation_subject_callee_hex_stage_000.js` `5d4bad739786a29f24896cb4b74b6bf756cb4a7941e55cdf886251169093db61`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14A	5007 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`deobfuscated.js` `9abb11c8c5684b46897e4180773eb4e20349e5dbd18fb5e3987c06054738b9e3`	deobfuscated-js	PDF JavaScript deobfuscation pass	42989 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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