Malicious PDF — malware analysis report

Static analysis result for SHA-256 feee7db22828da7c…

MALICIOUS

PDF

8.1 KB First seen: 2026-05-11
MD5: c57d29cd6b1fb92d80ef54f8141c703d SHA-1: 6badc3beaa58aebcbe69120f46f51423cba31ed2 SHA-256: feee7db22828da7ccd5d04cb2f632896b9abb08d816172a836c752ad0dc6f77c
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings related to PDF JavaScript and string manipulation. The obfuscation suggests an attempt to hide malicious functionality, likely for executing a second-stage payload. No specific URLs or executable content were directly extracted, limiting the ability to determine the exact payload or family.

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_off00000329.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x329 3248 bytes
SHA-256: 102020938c866a987f14e35da7754af70ff3447735a06a87af1e4ff7e860b327
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: 1b7db4d7b1c5775e04307dc36ac11d21a0eef4fe49081c8759e64afa5d2afa20

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