Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab823ffcea26f29…

MALICIOUS

PDF

7.1 KB
MD5: 6f4fee43d7b0117585fde4acca169690 SHA-1: e7e6a9a170df9984f95d4732e90faa88c24d58aa SHA-256: 7ab823ffcea26f298d413241d94a01c739a602651aa9853701c673bee2163449
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF sample contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS_EXPLOIT_CLUSTER'. The 'unescape()' call within the JavaScript suggests obfuscation and potential exploitation. While no specific URLs were found to be malicious, the presence of JavaScript and exploit-related heuristics strongly suggests the file is designed to download and execute a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9825

Heuristics 5

  • JavaScript action low 2 related findings PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded 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.
  • 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. (matched inside decoded 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.
  • 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.w3.org/1999/02/22-rdf-syntax-ns# In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00000327.bin
3a3a7cecc663e300600cf1851bf7d3f19bdde32bb29e75ac1655c339d4b29745		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327 2970 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
stream_003_off00000836.bin
6323bbf74f32bc772dfdf9bc6211ec17ae602207dcb51ae5d508d6327c684f8a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x836 442 bytes

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