Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b4308f8005bba0…

MALICIOUS

PDF

310.3 KB Created: Ñ+͛³–¦w¨·MvlÕõ Authoring application: ÅBOÂú[—¸ õë^=Ü–üû—˜ª€tK (via Ôr^’Éë[‚Ò-êó#4‡Ýߦ»‡¬å3v) First seen: 2026-05-11
MD5: ffe499f8e1ce6ab44d21c0fdc3d23bfa SHA-1: 2f22d5e6a08be98c8a03c7e7a6e27ff9fdf37338 SHA-256: c3b4308f8005bba04d0d94795f33e760a33b0ac93a6af8e4c43d9fae2593e807
616 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF contains JavaScript that utilizes the exportDataObject function to drop and launch an embedded executable disguised as 'news29.pdf'. This executable is detected as a Trojan by ClamAV. The PDF also contains a launch action targeting cmd.exe, indicating an attempt to execute commands and likely download a second-stage payload from the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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\\news29.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.
  • 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.
  • 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 tcp://192.168.1.67:4444 In extracted file (news29.pdf)

Related samples 7

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
news29.pdf pdf-embedded-file PDF EmbeddedFile object 47 at offset 0x8E61 37888 bytes
SHA-256: 02377a295874b60ff376b8fc967e08f8a63c0cfc3119ccbfc0675185de0183ea
Detection
ClamAV: Win.Trojan.Rozena-131
Obfuscation or payload: likely
actual_type=PE; declared_or_context_type=PDF; filename=news29.pdf; kind=pdf-embedded-file Static shellcode analysis recovered the Metasploit stager connect-back address: 192.168.1.67:4444 (reverse/x86, lab (non-routable)) 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: GetProcAddress, ExitProcess, LoadLibraryA, VirtualAlloc
javascript_obj0006_000.js pdf-javascript-stream PDF /JS object 6 at offset 0x85B 55 bytes
SHA-256: 8a9abaa2669a87d2d80ad769846413ba0fc05bfb0e5670578ce60245613ef3e7
Preview script
First 1,000 lines of the extracted script
this.exportDataObject({ cName: "news29", nLaunch: 0 });

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