Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4fa730d00839aaa…

MALICIOUS

PDF

70.9 KB
MD5: 369614d7c422201f2d1605f4befd452d SHA-1: f963c4f78cf00f6440774b1b6fe992ab03020151 SHA-256: e4fa730d00839aaaf4ae00fef4ab0854beccabfeb2541662a5391be85c48375c
514 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell T1105 Ingress Tool Transfer T1027 Obfuscated Files or Information T1071.001 Web Protocols

The PDF file contains embedded JavaScript that triggers a launch action, executing cmd.exe. This command is used to launch an embedded Windows executable disguised as 'W2.pdf'. The embedded executable was detected by ClamAV as 'Win.Trojan.Swrort-5710536-0', and the PDF itself was flagged as 'Pdf.Tool.Agent-1388586'. The combination of PDF launch actions, embedded executables, and JavaScript indicates a dropper or downloader functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 11

  • 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.
  • 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\\W2.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.
  • ClamAV: Pdf.Tool.Agent-1388586 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Tool.Agent-1388586
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • /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 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

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
W2.pdf
43bc71586e3edc838ab9616695814257b6d3ca217a1e09418b24274627674a6a		 pdf-embedded-file PDF EmbeddedFile object 52 at offset 0x6AE4 73802 bytes
Detection
ClamAV: Win.Trojan.Swrort-5710536-0
Obfuscation or payload: unlikely
javascript_obj0053_000.js
b2f245b16973a3e6b89b339cfba6591066c68ae3cad7f43d603b84c1dbc45d84		 pdf-javascript-stream PDF /JS object 53 at offset 0x117D6 51 bytes
icc_00_off00000d9c.icc
2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e		 pdf-icc-profile PDF ICC profile at offset 0xD9C 3144 bytes
font_00_cff_off00001a93.bin
94e7d9a21d2856078469bbdf85d5f74a33d085820ada3a6a9cce172adba60cea		 pdf-font-stream PDF embedded font (cff) at offset 0x1A93 494 bytes
font_01_cff_off00001ee1.bin
aadb2ce55ba708d4f839649ef88be7ee0861a852f9d4c7d8ea83b5024af74f43		 pdf-font-stream PDF embedded font (cff) at offset 0x1EE1 672 bytes
font_02_cff_off00002467.bin
0e823901bb3ed70439b5b5dfc5531cb590dabdeb85bfaf72fd4973212882b0f6		 pdf-font-stream PDF embedded font (cff) at offset 0x2467 2599 bytes
font_03_cff_off00003015.bin
8bbb166c7e90eac11d7d9bc6661d4478a7903505bb1067083609b1ddc6f0d234		 pdf-font-stream PDF embedded font (cff) at offset 0x3015 854 bytes
font_04_cff_off00003766.bin
14664b6d86b8afaf99e72f2b11a29e43c14fde525066b0290ffac2ced030fdab		 pdf-font-stream PDF embedded font (cff) at offset 0x3766 5819 bytes
font_05_cff_off00004e17.bin
4132e5c2eb329cc31b9f30de65a44f405e47795b4f92737b9e31231460a355e7		 pdf-font-stream PDF embedded font (cff) at offset 0x4E17 5178 bytes
font_06_cff_off000061ae.bin
0e840f4d0f2c9f613bf65b1c44ad193b6b86507748d7f01b450de94587b041a8		 pdf-font-stream PDF embedded font (cff) at offset 0x61AE 542 bytes

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