Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b94b992f82e3564…

MALICIOUS

PDF

558.4 KB Created: 2025-09-02 10:28:12 +03:00 Authoring application: Adobe InDesign 18.1 (Macintosh) (via Adobe PDF Library 17.0) First seen: 2026-05-25
MD5: e4c2eed547d997844d5b3dfdc729e73c SHA-1: bac6037ce039fd3dfbdcfa3c7823f40e4c2b5084 SHA-256: 8b94b992f82e3564ff7bd2979dca12f7c2e04b57108959cec3a50dafae7da95f
558 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 14

  • Adobe Reader Launch action command execution critical CVE exact CVE_2010_1240
    PDF uses the Adobe Reader/Acrobat Launch action pattern associated with CVE-2010-1240: cmd.exe is invoked with attacker-controlled parameters, paired with an embedded/exported payload.
  • ClamAV: Pdf.Tool.Agent-1388586 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Tool.Agent-1388586
  • Launch action critical PDF_LAUNCH
    PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
  • Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOAD
    PDF stream bytes contain an embedded Windows executable with a verified PE header. Exploit chains often hide droppers inside ordinary streams rather than standard /EmbeddedFile attachments.
  • /Launch action target: cmd.exe critical PDF_LAUNCH_COMMAND
    PDF /Launch action specifies an executable target with parameters '/Q /C %HOMEDRIVE%&cd %HOMEPATH%&(if exist "Desktop\\dkab10.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
  • Embedded attachment masquerades: declared document, content is windows-executable critical PDF_EMBEDDED_FILESPEC_CONTENT_MISMATCH
    An /EmbeddedFile attachment's declared filename extension or /Subtype MIME type contradicts the magic bytes of its decompressed content. The attachment is declared as a benign document or image but the bytes are an executable or executable-bearing archive. This is a deliberate deception used to hide droppers in PDF attachments and is a generic indicator of embed-and-drop weaponisation, independent of any specific CVE.
  • Suspicious extracted artifact critical 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.
  • /Launch action paired with attachment-dropping JS API high PDF_LAUNCH_PLUS_DROPPER_JS
    PDF combines a /Launch action with a JavaScript API call that writes or opens an attached/external resource — the canonical shape of the CVE-2010-1240 /Launch + exportDataObject family. Benign PDFs do not pair these surfaces; the combination indicates a drop-and-execute chain regardless of the specific JS API knobs or /Launch target.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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.
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://tymm.meb.gov.tr/upload/program/2024programdin9101112Onayli.pdf PDF link annotation
    • https://www.mevzuat.gov.tr/mevzuat?MevzuatNo=40317&MevzuatTur=7&MevzuatTertip=5In PDF document text
    • tcp://10.0.2.15:4444In extracted file (dkab10.pdf)
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#In PDF document text
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#In PDF document text
    • http://ns.adobe.com/illustrator/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/t/pg/In PDF document text
    • http://ns.adobe.com/xap/1.0/sType/Dimensions#In PDF document text
    • http://ns.adobe.com/xap/1.0/sType/Font#In PDF document text
    • http://ns.adobe.com/xap/1.0/g/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
dkab10.pdf pdf-embedded-file PDF EmbeddedFile object 141 at offset 0x8AA74 7168 bytes
SHA-256: 2efa4e556ea146f7a8ee9582798a80e2b99db3af519ec1307a95ed4ca0556cb0
Detection
ClamAV: No threats found
Obfuscation or payload: likely
actual_type=PE; declared_or_context_type=PDF; filename=dkab10.pdf; kind=pdf-embedded-file Static shellcode analysis recovered the Metasploit stager connect-back address: 10.0.2.15:4444 (reverse/x86, lab (non-routable)) Static shellcode analysis found candidate code region(s). Indicators: SC_STR_VIRTUALPROTECT, SC_PEB_ACCESS, SC_PUSH_STRING Static shellcode analysis recovered API/import strings: kernel32.dll, KERNEL32.DLL, VirtualProtect
javascript_obj0142_000.js pdf-javascript-stream PDF /JS object 142 at offset 0x8AE1F 55 bytes
SHA-256: 9374f9f95de68b21f5fc2f375ecdf364111e58e5bf5e06c3d3a1866e31e37221
Preview script
First 1,000 lines of the extracted script
this.exportDataObject({ cName: "dkab10", nLaunch: 0 });
stream_016_off0000ef05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEF05 54570 bytes
SHA-256: faff000f866d3ad6f4e245ff06a938b72a9e02983eb3d3301a11ba4f97d37b6c
font_00_sfnt_off0000be19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE19 10304 bytes
SHA-256: be71587f745837075dd65c28b8012f2cb0b82311f842c36c4f00c91cf84b6278
font_01_sfnt_off0000d6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E6 9632 bytes
SHA-256: 2cf7403da9f1d27d5a5418adcea6d901dadebd48f797843b2f78af977eb435e7
font_03_sfnt_off000153ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153EF 54484 bytes
SHA-256: 8d4b31259e051562271f74ce843aa55fc2b2abe59e442eebafe17549b4caa162
font_04_sfnt_off0001b810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B810 39764 bytes
SHA-256: a220bd5e692f2bef1ee16e7ee3d211c150fe9e062f754001fe782d33c9c8ba06
font_05_sfnt_off0002bcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BCDC 36207 bytes
SHA-256: 353b3c26fe74a6c4d46d198ff059958168d4586e7b04342e5163733970c7216b
font_06_sfnt_off000387b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x387B6 42840 bytes
SHA-256: 0c2f2f676168dadc6a235c812ff8d525fe8fde762b2166f688ea3ece24cefec8