PDF malware analysis — malicious · 4600edfdb9ad8b4a

MALICIOUS

PDF

46.8 KB

MD5: 0325b67a60c26a3380203a032f2246ee SHA-1: 0de21d04bb17b1047aec1f5fe85513ce2f760190 SHA-256: 4600edfdb9ad8b4a472b091efbb41f8bd3929943c86d025d9a0a280fa471deed

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, triggered by the 'collab.collectEmailInfo' function, which is indicative of CVE-2007-5659 exploitation. The heuristics indicate that this JavaScript acts as a stager, likely downloading and executing a second-stage payload. The presence of U3D content also suggests a potential exploit vector. No specific family could be identified, but the attack pattern is consistent with PDF-based malware delivery.

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` `e10073c3fbee019ba92ffefe96d8f3f0cede68dfdb93e3449754adbfa9894165`	pdf-javascript-stream	PDF /JS object 9 at offset 0x4C9A	471 bytes
`annotation_subject_callee_hex_stage_000.js` `6dfc494b79b819ea0efebf3d91b3c9105c8cc8a3ad7e8d67fda4f637120deb14`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x1F25	6396 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`deobfuscated.js` `bd35053fd60bb897cc239537a572373d42601084218d2c109e496f37b5c9b940`	deobfuscated-js	PDF JavaScript deobfuscation pass	321940 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off00004edd.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x4EDD	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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