PDF / .PD_ malware analysis — malicious · d5fc6b626a4e23a7

MALICIOUS

PDF / .PD_

45.5 KB

MD5: b919825673fc2c2936394f57a18edab5 SHA-1: 995fd695e6ec63c88ea87fd54193d3668c525c81 SHA-256: d5fc6b626a4e23a73cd2bf1f42785f8d617bd173fa750e0d3637f588a92acd15

166 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript T1059.007 JavaScript

The PDF file contains embedded JavaScript and exploits CVE-2007-5659 via the `collab.collectEmailInfo` function. This indicates an attempt to execute arbitrary code. The presence of U3D content and multiple JavaScript streams, including a large deobfuscated one, suggests a complex exploit chain designed to deliver a second-stage payload.

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` `fc5b426b863fda3995fccd3f522ce82f4a2e780f06c61c18c1f9c560eb55c984`	pdf-javascript-stream	PDF /JS object 9 at offset 0x4764	493 bytes
`annotation_subject_callee_hex_stage_000.js` `b129a81b336fc55a2d3e74a1f793e7c4e5f17c3a591afaa53d3494a0fe83e231`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x1C74	5712 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` `cfe9a9860b597ea60748d092cb5585d7fcf3f43ac3688ffd43724652d0805edd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1CC8	12783 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` `e0b4365e40b3957eb346a0c9ae03800dc2e09e8f7fb7cd677fd85ebb47f6503f`	deobfuscated-js	PDF JavaScript deobfuscation pass	236603 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off000049ad.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x49AD	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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