Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f73568b2351801…

MALICIOUS

PDF

177.2 KB Created: 2009-03-03 12:58:28 -05:00 Authoring application: Writer (via OpenOffice.org 3.0) First seen: 2026-05-10
MD5: 402120141fca36571322d2acba54a020 SHA-1: 7441ffe7da429a9a7ed8bdeb2f0e3692498e292a SHA-256: 03f73568b23518012f3831e76a082e9e42aae344fae52958cdd3d3909b01a2da
578 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that utilizes the `exportDataObject` function to launch an embedded executable disguised as 'invoice2.pdf'. This executable is detected by ClamAV as 'Win.Trojan.Swrort-9886728-0'. The PDF also contains a launch action for 'cmd.exe', indicating an attempt to execute commands on the victim's system. The combination of these factors strongly suggests a malicious document designed to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 14

  • 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\\invoice2.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.
  • /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.
  • 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
  • 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 http://www.irongeek.com/i.php?page=security/roguefileshares PDF link annotation
    • http://riscit.info/In PDF document text
    • http://irongeek.com/In PDF document text
    • http://www.irongeek.com/i.php?page=security/decaffeinatid-simple-ids-arpwatch-for-windowsIn PDF document text
    • http://www.irongeek.com/i.php?page=security/arpspoofIn PDF document text
    • http://www.irongeek.com/i.php?page=security/AQuickIntrotoSniffersIn PDF document text
    • http://theory.kaos.to/projects.htmlIn PDF document text
    • http://www.hamachi.cc/In PDF document text
    • http://www.theta44.org/karma/In PDF document text
    • http://www.remote-exploit.org/In PDF document text
    • http://www.monkey.org/~dugsong/dsniff/In PDF document text
    • http://www.oxid.it/cain.htmlIn PDF document text
    • http://www.softperfect.com/In PDF document text
    • http://www.irongeek.com/i.phpPDF link annotation
    • http://www.irongeek.com/i.php?page=security/decaffeinatid-In PDF document text
    • http://irongeek.comIn PDF document text
    • http://riscit.infoIn PDF document text
    • http://www.monotype.comhttp://www.monotype.com/html/type/license.htmlIn extracted file (font_00_sfnt_off0001565b.bin)
    • http://www.dd-wrt.com/In PDF document text
    • http://nmap.org/In PDF document text
    • http://www.torproject.org/In PDF document text
    • http://www.tcpdump.org/In PDF document text
    • http://ettercap.sourceforge.net/In PDF document text
    • http://www.wireshark.org/In PDF document text
    • http://www.monotype.com/html/mtname/ms_timesnewroman.htmlhttp://www.monotype.com/html/mtname/ms_welcome.htmlNOTIFICATIONIn extracted file (font_00_sfnt_off0001565b.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
invoice2.pdf pdf-embedded-file PDF EmbeddedFile object 55 at offset 0x2733E 37888 bytes
SHA-256: f7f9f38cb10981cd71448cf4c3b26df784ede9b8ea7a09487267231cd26ccf25
Detection
ClamAV: Win.Trojan.Swrort-9886728-0
Obfuscation or payload: likely
actual_type=PE; declared_or_context_type=PDF; filename=invoice2.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: GetProcAddress, ExitProcess, LoadLibraryA, VirtualAlloc
javascript_obj0056_000.js pdf-javascript-stream PDF /JS object 56 at offset 0x2C034 57 bytes
SHA-256: f9de902f7587df91976c816de25061afac03a989592f521746ae081efada7116
Preview script
First 1,000 lines of the extracted script
this.exportDataObject({ cName: "invoice2", nLaunch: 0 });
font_00_sfnt_off0001565b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1565B 42796 bytes
SHA-256: 026c2e32690fa459df8ba08a4804a6fad2bafdbd95012cd0fd90d87ad060d8d2
font_01_sfnt_off0001bb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB3D 61992 bytes
SHA-256: 4812f673d29ccbd908bb35115e8badb757aa428ca4e37d673529247d7eb54d42