Malicious PDF — malware analysis report

Static analysis result for SHA-256 6661f314c25c25a9…

MALICIOUS

PDF

30.0 KB Created: 2010-03-26 22:47:18 -03:00 Authoring application: Writer (via OpenOffice.org 3.2) First seen: 2026-05-10
MD5: 44670b25ef372d60e0ba66af0d877326 SHA-1: ba01f5d77ae609510e5fa2bf65b68a440f87fe80 SHA-256: 6661f314c25c25a92bf28de01687457034091a9b6caf5673e33336ff61f9c09e
576 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 leverages a launch action to execute cmd.exe. This command then attempts to run an embedded Windows executable, disguised as 'teste.pdf', which was detected as a malicious payload by ClamAV. The embedded executable is likely a downloader or stager for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 12

  • 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\\teste.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.
  • 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://192.168.0.4:47828 In extracted file (teste.pdf)
🗂 Part of campaign: shared payload 52212058b3 3 samples

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
teste.pdf pdf-embedded-file PDF EmbeddedFile object 17 at offset 0x283A 37888 bytes
SHA-256: e47a5cb5277593c78d01037a1b046d408b0e025c2e26be768ed25d9033ccdaf4
Detection
ClamAV: Win.Trojan.Rozena-131
Obfuscation or payload: likely
actual_type=PE; declared_or_context_type=PDF; filename=teste.pdf; kind=pdf-embedded-file Static shellcode analysis recovered the Metasploit stager connect-back address: 192.168.0.4:47828 (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_obj0018_000.js pdf-javascript-stream PDF /JS object 18 at offset 0x7481 54 bytes
SHA-256: 52212058b3bf4a94069e8fd5b07a00a0ba0b6f6d7a10aa614bf6cdd7c3dba282
Preview script
First 1,000 lines of the extracted script
this.exportDataObject({ cName: "teste", nLaunch: 0 });
font_00_sfnt_off00000108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108 14144 bytes
SHA-256: 211eefb0ad7e108c13f3ae15ca2dbfc272e9296588904448db0d19f0f860d14b

Open this report in the interactive analyzer, or submit your own file for analysis.