Malicious PDF — malware analysis report

Static analysis result for SHA-256 8091187a03c75c1b…

MALICIOUS

PDF

73.6 KB
MD5: 452de20ed1e7b211913ab66ccd54ab73 SHA-1: ac76d055b11dd2c20db4dfa0db538214021598c7 SHA-256: 8091187a03c75c1bd686f5048631fabd8201fbd87c3a4013e38fe5ca7c9f66d5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature. The JavaScript code is obfuscated and appears to be designed to download and execute a second-stage payload. The specific reconstructed URL or command could not be determined due to the obfuscation, but the presence of eval() and embedded JS streams points to code execution.

Heuristics 6

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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.

FilenameKindSourceSize
javascript_obj0005_000.js
e49962d888fcdc6e8ef6a5a20cb5ec23e029acdb801ee58b472db5dc8f758f8d		 pdf-javascript-stream PDF /JS object 5 at offset 0x160 74802 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
javascript_obj0005_001.js
6129dc7821c92e904dc93aa3a553faaef5d94940abda3b3f0070c0352784d24d		 pdf-javascript-stream PDF /JS object 5 at offset 0x160 64 bytes

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