MALICIOUS
558
Risk Score
Machine Learning
- Nyx PDF Classifier malicious score 0.9971
Heuristics 14
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Adobe Reader Launch action command execution critical CVE exact CVE_2010_1240PDF 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.
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ClamAV: Pdf.Tool.Agent-1388586 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Tool.Agent-1388586
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Launch action critical PDF_LAUNCHPDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
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Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOADPDF 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.
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/Launch action target: cmd.exe critical PDF_LAUNCH_COMMANDPDF /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.).
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Embedded attachment masquerades: declared document, content is windows-executable critical PDF_EMBEDDED_FILESPEC_CONTENT_MISMATCHAn /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.
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Suspicious extracted artifact critical EXTRACTED_FILE_STATIC_TRIAGEOne 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.
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/Launch action paired with attachment-dropping JS API high PDF_LAUNCH_PLUS_DROPPER_JSPDF 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.
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Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASIONPDF 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.
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JavaScript action low 1 related finding PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Embedded file low PDF_EMBEDDEDPDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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External URI info PDF_URIPDF contains an external URL action
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Embedded URL info EMBEDDED_URLOne 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.
| Filename | Kind | Source | Size |
|---|---|---|---|
dkab10.pdf |
pdf-embedded-file | PDF EmbeddedFile object 141 at offset 0x8AA74 | 7168 bytes |
SHA-256: 2efa4e556ea146f7a8ee9582798a80e2b99db3af519ec1307a95ed4ca0556cb0 |
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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
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javascript_obj0142_000.js |
pdf-javascript-stream | PDF /JS object 142 at offset 0x8AE1F | 55 bytes |
SHA-256: 9374f9f95de68b21f5fc2f375ecdf364111e58e5bf5e06c3d3a1866e31e37221 |
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Preview scriptFirst 1,000 lines of the extracted script
this.exportDataObject({ cName: "dkab10", nLaunch: 0 });
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stream_016_off0000ef05.bin |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0xEF05 | 54570 bytes |
SHA-256: faff000f866d3ad6f4e245ff06a938b72a9e02983eb3d3301a11ba4f97d37b6c |
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font_00_sfnt_off0000be19.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBE19 | 10304 bytes |
SHA-256: be71587f745837075dd65c28b8012f2cb0b82311f842c36c4f00c91cf84b6278 |
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font_01_sfnt_off0000d6e6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD6E6 | 9632 bytes |
SHA-256: 2cf7403da9f1d27d5a5418adcea6d901dadebd48f797843b2f78af977eb435e7 |
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font_03_sfnt_off000153ef.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x153EF | 54484 bytes |
SHA-256: 8d4b31259e051562271f74ce843aa55fc2b2abe59e442eebafe17549b4caa162 |
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font_04_sfnt_off0001b810.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1B810 | 39764 bytes |
SHA-256: a220bd5e692f2bef1ee16e7ee3d211c150fe9e062f754001fe782d33c9c8ba06 |
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font_05_sfnt_off0002bcdc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x2BCDC | 36207 bytes |
SHA-256: 353b3c26fe74a6c4d46d198ff059958168d4586e7b04342e5163733970c7216b |
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font_06_sfnt_off000387b6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x387B6 | 42840 bytes |
SHA-256: 0c2f2f676168dadc6a235c812ff8d525fe8fde762b2166f688ea3ece24cefec8 |
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