PDF malware analysis — malicious · a6c42d0d30779fae

MALICIOUS

PDF

39.2 KB

MD5: 7a4cc28d34b2771c41e4c75b8d0a2b89 SHA-1: 716fbb8cb3441901f0c90ae5a396c90b23a741f4 SHA-256: a6c42d0d30779faed2a61001c75332b6449b8ba4e25cec27da034623e48f670b

218 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript and exploits CVE-2007-5659 using the Collab.collectEmailInfo function. The critical heuristic indicates a JavaScript stager is recovered from an annotation subject, which is then hex-decoded and evaluated. This suggests the primary purpose is to download and execute a secondary payload. No specific family could be identified, but the exploit and stager mechanism are clear.

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.
ClamAV: Pdf.Exploit.Agent-36180 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36180
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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `17e11d5c0e7abf0d400044cf4333a75f193b35e2745d65fea155eb4de3ce3aa6`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1AD	628 bytes
`annotation_subject_callee_hex_stage_000.js` `2449754dfd2561b08af09b60401dce9b3835bc816af765e114e0ba77d4eb34ae`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x156	5388 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`u3d_00_off000030b4.bin` `0de4003a900e42a2dfc771b68a31232346c9f4f3771c57dc8bb04f4762da15d6`	pdf-3d-stream	PDF U3D 3D stream at offset 0x30B4	27387 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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