PDF / .EXE malware analysis — malicious · 9f14e06fc6f76527

MALICIOUS

PDF / .EXE

42.5 KB

MD5: e2a59b706effb25ea88cb3feec9eb8db SHA-1: dfc1e12ab764ad8529b20ababb818b0dfd4fb3bd SHA-256: 9f14e06fc6f765279579292dc75ac7602cb355e871758493cda22e7a3d8f1537

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that is obfuscated and uses a hex decoder. The critical heuristic CVE_2007_5659 indicates exploitation of a vulnerability related to `Collab.collectEmailInfo` and `syncAnnotScan` to stage and execute JavaScript. The primary intent appears to be the execution of a second-stage payload via this exploit chain. No specific family could be identified.

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)
U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
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_obj0009_000.js` `b5dadd29c00c6c92b83fe9a317dd0f2511505b004ab2437a5a0a4eaea86c4a51`	pdf-javascript-stream	PDF /JS object 9 at offset 0x4688	497 bytes
`annotation_subject_callee_hex_stage_000.js` `56b76efa8943a44be0fef06c83188004e677efc0c0f379f118e47d851a760a25`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x1C32	5735 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `1932a1231c29a7d8dc2f2c0189c60c93bd5d290abcba55dc46f7fb5b532a1cc1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1C86	12842 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`deobfuscated.js` `614c2ee629ee032ec8bc1150f4c18992e469883bb9f71160865446512737df86`	deobfuscated-js	PDF JavaScript deobfuscation pass	145210 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).

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