Malicious PDF — malware analysis report

Static analysis result for SHA-256 9488bdee23f5bc27…

MALICIOUS

PDF

8.1 KB First seen: 2026-05-11
MD5: d1a72a8167a8f8f59ced7ae70701e305 SHA-1: de455f3fcb65f95e7808340868c07a432b3e4a4f SHA-256: 9488bdee23f5bc27342da321e9d5d77a0a88578310d4ddb7ae0d6166fb56990a
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream uses String.fromCharCode, suggesting obfuscation. While no specific malicious URLs or scripts were directly extracted, the presence of obfuscated JavaScript within a PDF is a strong indicator of malicious intent, likely to download and execute a second-stage payload. The file's metadata and heuristics point towards a suspicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9224

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.
    Matched line in script
    isgngva="0T1+1Z1f2Z1d3K1b3]1`2h1^3b1[2V2g1H1S1V2d1T3Z3_1O1P272f1M3^1K3S1I3f3h1F2]1D3L1B3d1:1=1>2Y2e1;2T2W1215163/33133+3-1.1/3G3T1,3=3E0^0i3`0g3M0c0d242R0a3a0_2L2U0Y0Z2[2_0W3P0U3N3Y0:0K0P2O0N2^0L3V3X0I2J0G2b0A0D2S0B3I3Q0=0>3W3c0;2X3R06072`3O042a2c";erfqcm="FNeLCFj9=LehXLcPW9,05.Kh>a^b,g>@?:hIO_a_W9,05.UeECfVQI_I?0RI`7VhZY//O??1K-/L?5ceMZKL[2T>@?;I454Rg2BV<RG;c:[BOI/N85.[LeHf@J9TPaHMcR`ZT>@?:aN_0QRg2BV<4O/KI45,LZRVTOZKTY7Y5R:ZZM`-TQ_HRj:ZZM]ac?454SF2DO4RG:AR4+:4+;>RVTOZKT.gg7:eJY@J**+>RVTOZKT3,9= …
  • 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_off00000328.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x328 2958 bytes
SHA-256: 4ffea3c7fc92792d64cf6ba955147224d78936835ba9388c6e4f1d8a76bff7b3
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
objstm_0024_00.bin pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 331 bytes
SHA-256: 927039c95c0a84b5b9def5cae17346342ee9a13f55b663f5ac24f1d8121d3977

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