PDF malware analysis — malicious · 46d446dc4df82768

MALICIOUS

PDF

51.0 KB Created: 2007-08-26 17:52:02 -05:00 Authoring application: TeX (via pdfeTeX-1.21a)

MD5: d3d263af2fa05586d9dc0ec61dd5b0c8 SHA-1: 43b3cbdd42d1ad82af1064494041615d97969079 SHA-256: 46d446dc4df827688271bbbf613df99f1233f99079959f0bafa2dd9f36cfe3c2

486 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The PDF file contains JavaScript that leverages a launch action to execute cmd.exe. This command is designed to drop an embedded Windows executable, masquerading as 'LE.pdf', which is detected by ClamAV as Win.Trojan.MSShellcode-6360730-0. The overall behavior aligns with a malicious PDF dropper exploiting CVE-2010-1240 to deliver a secondary payload.

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.
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 (if exist "%HOMEPATH%\\My Documents\\LE.pdf" (cd "%HOMEPATH%\\My Documents"' — 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.Exploit.Agent-14242 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-14242
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
Suspicious extracted artifact info 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.

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`LE.pdf` `b532670871712a0ff6162ededd968caab654600038b866b8908a652f781b9f5a`	pdf-embedded-file	PDF EmbeddedFile object 33 at offset 0x7935	37888 bytes
Detection ClamAV: Win.Trojan.MSShellcode-6360730-0 Obfuscation or payload: unlikely
`javascript_obj0034_000.js` `97b829884145741c4521151e2204d3cb9ec67617874d222410b0928ea4cb6a1e`	pdf-javascript-stream	PDF /JS object 34 at offset 0xC7F7	51 bytes
`stream_004_off0000301c.bin` `a2851aaaee25628c7bfd28520a51d5b29a2859eb7b6aaf286009ee4eac2caeb9`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x301C	4049 bytes
`font_00_type1_off00002084.bin` `f3ffffe0c897830f44f0bd7070917846b40f91cb936f86a4c509881d83c31690`	pdf-font-stream	PDF embedded font (type1) at offset 0x2084	4029 bytes
`font_02_type1_off00003fe2.bin` `ef686dcee34ed1b08e5572a7dc746fad32644542221a0c894e787baaea51a0d3`	pdf-font-stream	PDF embedded font (type1) at offset 0x3FE2	13097 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.79, consistent with packed or encrypted content.

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