Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf042b0ec2dc0b3…

MALICIOUS

PDF

587.3 KB Created: üÜF ¤)ÿ2“5ÿí¹fˆL Authoring application: ïIœ (via õGV_ÁFî,”<h…¨êÈ"ÂK¯R½^Kå=)) First seen: 2026-05-10
MD5: 45805a50bc7af9c6428f76723dfeea25 SHA-1: 6ed7d8bd9febba81b076ac46f81de5f218882d5e SHA-256: 9cf042b0ec2dc0b3a2d92c1987b8c0be15f0b7ea404323f00eb581a6f85221a7
576 Risk Score

Malware Insights

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

The PDF contains JavaScript that uses the exportDataObject function to drop and potentially launch an embedded executable disguised as 'orig.pdf'. This executable is detected by ClamAV as Win.Trojan.Swrort. The PDF also contains a launch action targeting cmd.exe, indicating an attempt to execute arbitrary commands. The embedded JavaScript and launch action strongly suggest exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 13

  • 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\\orig.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.
  • Encrypted PDF carries /JavaScript — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JS
    PDF declares /Encrypt and also references an executable trigger (/JavaScript). Document encryption hides the JavaScript body and stream contents from static scanners — combined with auto-execution indicators this is a known evasion pattern used to deliver weaponised JavaScript that the analyst cannot inspect without the decryption key.
  • /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.
  • Suspicious extracted artifact medium 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 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
  • 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.zeustech.net/ Referenced by PDF JavaScript
    • http://]hostname[:port]/pathIn extracted file (orig.pdf)
    • http://www.apache.org/Referenced by PDF JavaScript

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
orig.pdf pdf-embedded-file PDF EmbeddedFile object 40 at offset 0x2A1A 73802 bytes
SHA-256: fce317a664f60aafaaf2d5f9b4568251bb59db13274ff7cc298ea3defab2b845
Detection
ClamAV: Win.Trojan.Swrort-9886728-0
Obfuscation or payload: likely
actual_type=PE; declared_or_context_type=PDF; filename=orig.pdf; kind=pdf-embedded-file Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS, SC_MSF_BIND, SC_PUSH_STRING Static shellcode analysis recovered API/import strings: kernel32.dll, advapi32.dll, KERNEL32.DLL, ADVAPI32.DLL, LoadLibraryA, GetProcAddress
javascript_obj0006_000.js pdf-javascript-stream PDF /JS object 6 at offset 0x11FC 53 bytes
SHA-256: 151d9872cd4fc457e2ecaecb13fb24ddb49058e1f569a39bec6c02325a1e3424
Preview script
First 1,000 lines of the extracted script
this.exportDataObject({ cName: "orig", nLaunch: 0 });

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