PDF malware analysis — malicious · 00e823916741adc3

MALICIOUS

PDF

2.1 KB Created: 2010-08-02 01:11:13 +04:00 Authoring application: PDFill: Free PDF Writer and Tools

MD5: b74ac4437ea941f042675cc9b7b0f9b7 SHA-1: 31a1fb82c77a80a1871b3ee861da11365c9ff45d SHA-256: 00e823916741adc32207cd0e835ea1bda33bb47bb0effe07289bce3121c936e2

212 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File: User Execution T1071.001 Web Protocols: Web Protocols

The PDF file contains embedded JavaScript that utilizes the `unescape` function and a heap spray technique, indicating an attempt to exploit a known vulnerability (CVE-2007-5659, Collab.collectEmailInfo). The script's primary function appears to be preparing for shellcode execution, likely to download and run a secondary malicious payload. The presence of external URIs further supports this delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 8

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. (matched in decompressed stream)
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
External URI info PDF_URI

PDF contains an external URL action
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.pdfill.com
- http://www.pdfill.com)/S/URI

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `184e1417eaed69867a925bed585fbf994d67cf4e86e5bdeec1bec8e33aaeaa79`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	477 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.