Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7c6059a61077fe…

MALICIOUS

PDF

215.0 KB First seen: 2026-05-08
MD5: 77a937527608053abe848704085e41e1 SHA-1: 4dbaafa8f311485a8df6bd1b437809b391e598e4 SHA-256: ee7c6059a61077fee0d57cbac8055a31a8f39a255db9febac7df3f3788b2ef9c
78 Risk Score

🔏 Digital signature Modified after signing

A signature covers the whole signed byte range — PDF JavaScript is never signed on its own — and does not by itself mean the document is safe.

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file exhibits multiple indicators of malicious intent, including embedded JavaScript and embedded script payloads. The presence of a large JavaScript stream (stream_009_off00001288.js) strongly suggests an attempt to download and execute a second-stage payload. While the specific family is not identifiable, the techniques used point towards a downloader or dropper malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4345

Heuristics 9

  • Active content added after the PDF was signed medium PDF_SIGNATURE_POST_SIGN_MODIFICATION
    An incremental update appended AFTER the signed byte range introduces active content (/EmbeddedFile, /Catalog). Some of this can occur in legitimate form-fill (field scripts, a rewritten /Catalog), so it is suspicious rather than damning — but it is content the signer did not approve.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • JavaScript action low 1 related finding 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)
  • 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)
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://www.services-publics.lu/assistants/public-defo?ECITIZ_ACTIVITY_PATH=Usager&amp;ECITIZ_PROCESS_ID=MULT-DEFO&amp;FORM_TYPE_ID=AEV_VFE_FR Referenced by PDF JavaScript
    • http://w.evcspbisl/sitnspbi-eoEII_CIIYPT=sgrapEII_RCS_DML-EOapFR_YEI=E_F_RReferenced by PDF JavaScript
    • http://wwsrie-ulc.uassat/ulcdf?CTZATVT_AHUae&mReferenced by PDF JavaScript
    • http://www.adobe.com/go/reader_downloadIn PDF document text
    • http://www.adobe.com/go/acrreaderIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/Referenced by PDF JavaScript
    • http://ns.adobe.com/pdf/1.3/Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/mm/Referenced by PDF JavaScript
    • http://purl.org/dc/elements/1.1/Referenced by PDF JavaScript
    • http://ns.adobe.com/xfa/promoted-desc/Referenced by PDF JavaScript
    • http://www.adobe.com/go/acrIn PDF document text
    • http://cgi.adobe.com/special/acrobat/updateReferenced by PDF JavaScript
    • http://www.adobe.com/products/acrobat/readstep2.htmlReferenced by PDF JavaScript
    • http://www.adobe.com/supporReferenced by PDF JavaScript
    • http://ns.adobe.com/xdp/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xci/2.6/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-template/2.6/Referenced by PDF JavaScript
    • http://www.w3.org/1999/xhtmlReferenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-data/1.0/Referenced by PDF JavaScript
    • http://get.adobe.com/readerReferenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-locale-set/2.6/Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-form/2.8/Referenced by PDF JavaScript

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0068.bin pdf-embedded-file PDF EmbeddedFile object 68 at offset 0x34C5C 162 bytes
SHA-256: 84efc8eddb4daa588488a6688047b9dbcc40cc08bf0bb7d4dfb27c64742ce21b
embedded_file_obj0069.bin pdf-embedded-file PDF EmbeddedFile object 69 at offset 0x34D4E 2941 bytes
SHA-256: ffb29c5636c654eef73c5322139c6bb52605a53d31ee3eceb81bebbb8bc9f8b3
embedded_file_obj0070.bin pdf-embedded-file PDF EmbeddedFile object 70 at offset 0x3505A 4717 bytes
SHA-256: cbfddb938f755fb8e568e438b49cfe85980175e5a6f06a132d7b820f83bfd7f1
stream_002_off00000350.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0x350 1313 bytes
SHA-256: f94e41f586bf3f20bc1deeac4bfbda388a61db43f25fbd6304ba73f5653368cf
stream_003_off0000052e.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52E 902 bytes
SHA-256: 1b2ec98752b966f601d5223a750559cf13d562ac5e5c6d1fcc7217835b01f5fd
stream_008_off00000f2a.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF2A 1950 bytes
SHA-256: 19c8105733a96d49f1455f10507a3e7f7e89208fdf83ce01942eff00c492aa88
stream_009_off00001288.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1288 478170 bytes
SHA-256: 45e3f4f28809073156b5393d9212b986a9e059d674cde87d3d3b0b410dbec232
Detection
ClamAV: No threats found
Obfuscation or payload: likely
3527 of 6147 identifiers look randomly generated (e.g. 'A000B000C000D000F00100011001200130014001'); 60 string-concatenation chain(s) — consistent with name-mangling obfuscation. Carved artifact contains 2 long base64-like blob(s).
stream_010_off0002e6d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E6D6 5547 bytes
SHA-256: 02816c26df8d4b33210e88ed26c5bfdf92e8d642032c682bf9ab3c97429c88de
stream_011_off0002ea59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EA59 121 bytes
SHA-256: 90938f9e3cdf6db2eeee31ed7c949f3b0952b799b670df73d2e56d31bfcc8d34
objstm_0039_00.bin pdf-objstm-decoded PDF /ObjStm 39 0 obj (inflated) 617 bytes
SHA-256: 1169f0f9bc256258f6996829c323c18d7282a5f67e2f08a102d981cb3b1247f4

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