PDF malware analysis — malicious · ea3ceb6e27de28dd

MALICIOUS

PDF

9.2 KB

MD5: ff957f8e59e5a08a1c7599a30df81af6 SHA-1: bce9fa08ae8552c28c2643537d3ade4e7f816ed4 SHA-256: ea3ceb6e27de28dd2f5d07d10de8452dea94485e5e2d0536b7092f615034049a

126 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 related to `Collab.collectEmailInfo`. The analysis recovered multiple deobfuscated JavaScript files, indicating a complex execution chain. The primary attack vector appears to be the exploitation of this PDF vulnerability to run arbitrary code, likely to download and execute a secondary payload.

Heuristics 6

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)
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` `1edd073fd8838b6f87d61dd8a2e4a77130d86d9078ee76d268a4e6da3b146e4f`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14A	4895 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` `fef3a8511e88f78892b4cd1cecdaa8d6a3b8a378e5b316cd4e004ceb60e80088`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2CA	11798 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` `ea96597dbe8e47fd9572027449c3850a035a769be1e6c27dcc56f99e7a1fe003`	deobfuscated-js	PDF JavaScript deobfuscation pass	44054 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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