PDF / .TXT malware analysis — malicious · 3d11e8f7aa390d78

MALICIOUS

PDF / .TXT

12.3 KB

MD5: 8fa4ae7c45b93d1d7513bc5e40f53423 SHA-1: 08a157dfb056c7a0107b2304a453f32e8f0f47ce SHA-256: 3d11e8f7aa390d785e8319aa9f7b95679d7b8e1f45bca1857d953a5d9cf4d7ff

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability, specifically targeting the 'collab.collectEmailInfo' function. Static analysis indicates that this JavaScript is responsible for downloading and executing a secondary payload. The presence of multiple deobfuscated JavaScript files further supports the multi-stage nature of this attack. The ClamAV detection 'Pdf.Exploit.Agent-35903' confirms the malicious nature of the file.

Heuristics 6

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)
ClamAV: Pdf.Exploit.Agent-35903 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35903
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `860eae5f96eb426380281c575a089242b50523bbb4bbb8dd765e582cd9c07d2e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	294 bytes
`legacy_pdfkit_stage_000.js` `c86823d2c26445fe9ef670312b2a1c59334eca7c9808fcaaf42f9d9bcddbe417`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E8	5258 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `191d8059af8b4297f9381fa9022f757ea5db4ca2acceb7bebc273cbc8b5d9dde`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E8	12575 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).

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