PDF malware analysis — malicious · cea030a12bfcc50c

MALICIOUS

PDF

45.5 KB

MD5: ee3d1c5977ff4c89b95bf31889378f56 SHA-1: 3bb71d3e211e8923552b288cf6b6d102ac8245be SHA-256: cea030a12bfcc50cd02c6431717cf64965d45de083ef7283c4d15e505c18732f

166 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript and exploits CVE-2007-5659 (Collab.collectEmailInfo) to execute a stager. This stager is heavily obfuscated but appears to download and execute a second-stage payload. The presence of U3D content also indicates a potential exploit vector. The exact nature of the second-stage payload could not be determined due to the obfuscation, but the overall pattern suggests a downloader or dropper.

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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `566a8676a9e20f2028826c7c6722093cdf587e8c20c1e80c3a17f7e766b06e38`	pdf-javascript-stream	PDF /JS object 9 at offset 0x4765	440 bytes
`annotation_subject_callee_hex_stage_000.js` `aeaa58fc32afda850f037a5c25585fff45754f5b5d09b78ff74f58f813ba3d8f`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x1D1D	5868 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` `0b8b181fbbf2c0cb6e4a2bf505d300687e433d73b6f9d7ee0d398179d110efc8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1D71	12926 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` `4b2f9da65e076952a5c89d53915a8d063da0879112888768642d4b12d462f14b`	deobfuscated-js	PDF JavaScript deobfuscation pass	232019 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off0000499e.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x499E	28021 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.79, consistent with packed or encrypted content.

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