Malicious PDF — malware analysis report

Static analysis result for SHA-256 4acfb04e2b997c0d…

MALICIOUS

PDF

417.1 KB Created: 2026-05-07 17:33:05 +05:30 Authoring application: Microsoft® Word 2016 First seen: 2026-05-18
MD5: c04a04b7797ae9783b6fd50a376c4e8b SHA-1: f66f449a16498a6d5032238525d7cf2fe838e43b SHA-256: 4acfb04e2b997c0dcc914a370beee770d2c0c11a4db97ee9883e359eb5f38ce4
718 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains JavaScript that triggers a launch action, executing cmd.exe. This action is designed to drop and execute an embedded Windows executable payload, identified as 'wiki.pdf' by the 'exportDataObject' function. The combination of CVE-2010-1240 and CVE-2023-26369 related exploits, along with the embedded PE payload, strongly indicates a malicious intent to execute arbitrary code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 16

  • 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.
  • TrueType bitmap font + active content — CVE-2023-26369 related high CVE related PDF_CVE_2023_26369_RELATED
    PDF embeds a TrueType font with bitmap tables (EBDT/sbix/CBDT) alongside exploit delivery indicators — CVE-2023-26369 exploits the sfac_GetSbitBitmap function in Adobe's libCoolType for arbitrary code execution. This CVE was actively exploited in the wild, but this rule does not validate the malformed EBLC/EBDT primitive.
  • 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\\wiki.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.
  • 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.
  • 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.
  • 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.
  • /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.
  • 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 tcp://192.168.174.128:9090 In extracted file (wiki.pdf)
    • https://en.wikipedia.org/wiki/Help:IPA/EnglishPDF link annotation
    • https://en.wikipedia.org/wiki/Help:Pronunciation_respelling_keyIn PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTEDeversonKennedy2005-1In PDF document text
    • https://en.wikipedia.org/wiki/Aboriginal_TasmanianIn PDF document text
    • https://en.wikipedia.org/wiki/NuenonneIn PDF document text
    • https://en.wikipedia.org/wiki/Bruny_IslandIn PDF document text
    • https://en.wikipedia.org/wiki/TasmaniaIn PDF document text
    • https://en.wikipedia.org/wiki/Colonization_of_AustraliaIn PDF document text
    • https://en.wikipedia.org/wiki/Black_WarIn PDF document text
    • https://en.wikipedia.org/wiki/George_Augustus_RobinsonIn PDF document text
    • https://en.wikipedia.org/wiki/Wybalenna_Aboriginal_EstablishmentIn PDF document text
    • https://en.wikipedia.org/wiki/Flinders_IslandIn PDF document text
    • https://en.wikipedia.org/wiki/Port_Phillip_DistrictIn PDF document text
    • https://en.wikipedia.org/wiki/Victoria,_AustraliaIn PDF document text
    • https://en.wikipedia.org/wiki/Oyster_Cove,_TasmaniaIn PDF document text
    • https://en.wikipedia.org/wiki/Colony_of_TasmaniaIn PDF document text
    • https://en.wikipedia.org/wiki/Genocide_of_Indigenous_AustraliansIn PDF document text
    • https://en.wikipedia.org/wiki/Thomas_BockIn PDF document text
    • https://en.wikipedia.org/wiki/Recherche_BayIn PDF document text
    • https://en.wikipedia.org/wiki/Van_Diemen%27s_LandIn PDF document text
    • https://en.wikipedia.org/wiki/Eastern_Tasmanian_languagesIn PDF document text
    • https://en.wikipedia.org/wiki/Port_DaveyIn PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTEPybus2020280In PDF document text
    • https://en.wikipedia.org/wiki/James_CookIn PDF document text
    • https://en.wikipedia.org/wiki/Adventure_Bay,_TasmaniaIn PDF document text
    • https://en.wikipedia.org/wiki/File:Truganini_10129062-3x4-700x933.jpgIn PDF document text
    • https://en.wikipedia.org/wiki/Convicts_in_AustraliaIn PDF document text
    • https://en.wikipedia.org/wiki/HobartIn PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTEPybus20205In PDF document text
    • https://en.wikipedia.org/wiki/Aboriginal_TasmaniansIn PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTELawson2014b4-4In PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTEMcGrath1995309-5In PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTERyan201271-6In PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTERyan201274-7In PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTEPybus20208In PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTEPybus2020280-9In PDF document text
    • https://en.wikipedia.org/wiki/James_Erskine_CalderIn PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTEPybus2020281-10In PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTERae-Ellis197628In PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTERyan2012268-12In PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTERae-Ellis197627-13In PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTERyan201287In PDF document text
    • https://en.wikipedia.org/wiki/George_ArthurIn PDF document text
    • https://en.wikipedia.org/wiki/Martial_lawIn PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTEPybus202010In PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTEMcGrath1995319In PDF document text
    • https://en.wikipedia.org/wiki/RationingIn PDF document text
    • https://en.wikipedia.org/wiki/Indian_removalIn PDF document text
    • https://en.wikipedia.org/wiki/Truganini#cite_note-FOOTNOTERyan2012151In PDF document text
    +171 more URL(s)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
wiki.pdf pdf-embedded-file PDF EmbeddedFile object 903 at offset 0x679E9 7168 bytes
SHA-256: 3d7100a2078290f0adda46784c8b5f67d3aebce231de7016a5ef30bf83793b6a
Detection
ClamAV: Win.Trojan.MSF_Shellcode-1
Obfuscation or payload: likely
actual_type=PE; declared_or_context_type=PDF; filename=wiki.pdf; kind=pdf-embedded-file Static shellcode analysis recovered the Metasploit stager connect-back address: 192.168.174.128:9090 (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_obj0904_000.js pdf-javascript-stream PDF /JS object 904 at offset 0x67D91 53 bytes
SHA-256: d41a5ec53c98233a23c450ed41beebd5b0ba6810a911b99f2113e5f821909488
Preview script
First 1,000 lines of the extracted script
this.exportDataObject({ cName: "wiki", nLaunch: 0 });
stream_011_off00040f8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40F8E 114716 bytes
SHA-256: 57f15523bd0a4d0986464828679aee2718076cb6d8128ad6bfd62f19d4d8c9c5
stream_013_off0004af32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF32 165720 bytes
SHA-256: 6923072b0485f5c119519ccbcaf3b8b9a20eb91c664ae5731fa9222b07d03ed3
font_02_sfnt_off0005bf3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF3A 69080 bytes
SHA-256: 9adc0d7ca7e60efa9c4be81c862a8aa0c1029eaf269b44d4c6c3cea57bb20ec2

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