PDF malware analysis — malicious · 4815e44e3b6965dc

MALICIOUS

PDF

30.4 KB Created: 2009-05-01 21:21:45 Authoring application: ghjkSFghjkCPx (via afdsdgf)

MD5: 3e58f1f9abe02c551a9ccd1d4fc79a5c SHA-1: 6d173a9aa3ae7bb69bf3e0a1f377bd0ee4b3bf91 SHA-256: 4815e44e3b6965dceb032b7c13539d70555dec59ae1381eb5f2af2ad546cbd2c

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious Link: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream utilizes eval() calls, a common technique for obfuscation and dynamic code execution. The reconstructed string 'tp.splt' suggests the script is intended to download and execute a second-stage payload. The ClamAV detection further confirms the malicious nature of the file.

Heuristics 6

ClamAV: Pdf.Exploit.Agent-35587 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35587
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `79235c5a315d4e72372ee50e321863d9b02fca8c723987c422cf4e9ce7e438a0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x21C	29856 bytes
Detection ClamAV: Pdf.Exploit.Agent-35587 Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `0ef288ad66bb6aaaf43393bd9bba0cf78a34a993fa50bbfca4c6200b2794c99f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x21C	28845 bytes

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