Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a60c5caeba1657f…

MALICIOUS

PDF

230.1 KB Created: 2017-08-03 05:27:59 -06:00 Authoring application: Draw (via LibreOffice 5.0) First seen: 2026-05-04
MD5: 46c863f7812d13aa0685c7227b9c265f SHA-1: d28564ab2455184b28b1aee15b6dff7e1d9a166c SHA-256: 9a60c5caeba1657f67aa67d7c47026ab99434d74a4568464a12b151980341d26
624 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 payload. This payload is disguised as a PDF file named 'Temario.pdf' but is detected as a Windows executable by ClamAV. The PDF also contains a launch action for `cmd.exe`, indicating an attempt to execute arbitrary commands. The embedded JavaScript and launch action together strongly suggest an exploit targeting CVE-2010-1240 to achieve client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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\\Temario.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.
  • 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.
  • 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 low 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.zeustech.net/ Referenced by PDF JavaScript
    • http://]hostname[:port]/pathPDF link annotation
    • tcp://192.168.0.13:4444PDF link annotation
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/CopyrightPDF link annotation
    • http://www.typoland.com/PDF link annotation
    • http://www.ascendercorp.com/http://www.ascendercorp.com/typedesigners.htmlLicensedPDF link annotation
    • http://www.urwpp.dedesign@bigelowandholmes.comPDF link annotation
    • http://www.apache.org/Referenced by PDF JavaScript
    • http://scripts.sil.org/OFL).http://scripts.sil.org/OFLPDF link annotation
    • http://scripts.sil.org/OFLPDF link annotation
    • http://www.apache.org/licenses/LICENSE-2.0PDF link annotation
    • http://pfaedit.sf.net/PDF link annotation

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
Temario.pdf pdf-embedded-file PDF EmbeddedFile object 72 at offset 0x2E7B7 73802 bytes
SHA-256: 770fea5a6f697220a4c877d62e7372b0bb9e84ada954a6fbf5481797bf2ab56f
Detection
ClamAV: Win.Trojan.MSShellcode-7
Obfuscation or payload: likely
actual_type=PE; declared_or_context_type=PDF; filename=Temario.pdf; kind=pdf-embedded-file Static shellcode analysis recovered the Metasploit stager connect-back address: 192.168.0.13:4444 (reverse/x86, lab (non-routable)) Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS, SC_MSF_REVERSE, SC_PUSH_STRING Static shellcode analysis recovered API/import strings: kernel32.dll, advapi32.dll, KERNEL32.DLL, ADVAPI32.DLL, LoadLibraryA, GetProcAddress
javascript_obj0073_000.js pdf-javascript-stream PDF /JS object 73 at offset 0x393F8 56 bytes
SHA-256: 93bd49586c2d9617b66a148b0b1234b4ea268603419b581ee29c4b6f808146e0
Preview script
First 1,000 lines of the extracted script
this.exportDataObject({ cName: "Temario", nLaunch: 0 });
font_00_sfnt_off00012213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12213 11764 bytes
SHA-256: 0569ce81c5c3bf52223c3c6fa90a4c7e2679fb83004ec0103f091f7fa8847c23
font_01_sfnt_off00014080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14080 11224 bytes
SHA-256: 68ed5ef8696521616f2fe977ab14b7477867383d25c47ebbcab3407180a0a707
font_02_sfnt_off00015c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C8C 21588 bytes
SHA-256: eb08760642bf3b4df743774a24b9c8e8a1404f4cd119921a96060e6277ad8f2e
font_03_sfnt_off00019805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19805 3716 bytes
SHA-256: c12bd58d35f456e5676add1db6b289d108f7c50a2b8fdf9b4e0adca475affd00
font_04_sfnt_off0001a400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A400 6480 bytes
SHA-256: e5cf08d9464cf7a1906b937d6ddf132e16beebe6da7d206b21c543670c98a08b
font_05_type1_off0001b6b6.bin pdf-font-stream PDF embedded font (type1) at offset 0x1B6B6 72380 bytes
SHA-256: 33a50f09ed2a533eaef6a34ec17c50c6993cd79a19d77c3bcfcc56cdce2b17e8
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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