PDF malware analysis — malicious · fa691cbed1c70d12

MALICIOUS

PDF

320.8 KB Created: 2007-04-19 01:13:58 UTC Authoring application: FrameMaker 7.2 (via Acrobat Distiller 7.0 (Windows))

MD5: 54b83573ecc58d3c9a140ee926f891a9 SHA-1: c06a422b4fafaec7fb397af37099b31f8db92beb SHA-256: fa691cbed1c70d1275a17c3a57dc38a8ecc6da19cc667ec49b564d6b350f62a3

426 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.003 Windows Command Shell T1105 Ingress Tool Transfer T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and a launch action that executes cmd.exe. This command-line execution is designed to drop and run a Windows executable payload, disguised as 'msexchng.pdf'. The ClamAV detection and critical heuristic firings strongly indicate a malicious dropper functionality.

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 %HOMEDRIVE%&cd %HOMEPATH%&(if exist "Desktop\\msexchng.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
/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.
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.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 11

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`High_Quality_Print.joboptions` `92c1099a336b70e5880354bb469740551af654515aa5d5c09de8ad1b8f33cf14`	pdf-embedded-file	PDF EmbeddedFile object 19 at offset 0x290CC	15773 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 13 long base64-like blob(s).
`msexchng.pdf` `fcd06aa466ea22088f908ea42d2b17c88097139f7366b46ad198543b17eb842e`	pdf-embedded-file	PDF EmbeddedFile object 232 at offset 0x2E630	193536 bytes
`javascript_obj0233_000.js` `2a3d5036c1de94357ab6f932ff6d7cb2e3ef331b75111f1164c65b6d50f764e6`	pdf-javascript-stream	PDF /JS object 233 at offset 0x4FE41	57 bytes
`font_00_cff_off0000318d.bin` `7193c32364a81bf7ddf2cef34b284488e6e35c813b49e565fcfd3f8170d96b0f`	pdf-font-stream	PDF embedded font (cff) at offset 0x318D	338 bytes
`font_01_cff_off00003319.bin` `77dc3d77a509c7b019b2241c74470cd4d972a70ca2fcc386d7004ae5d032f5a5`	pdf-font-stream	PDF embedded font (cff) at offset 0x3319	1223 bytes
`font_02_cff_off000037dc.bin` `db89ac3a1e10ee22212b88bc0c15092da75b9062868b7eda6407b7d871c17e4f`	pdf-font-stream	PDF embedded font (cff) at offset 0x37DC	3927 bytes
`font_03_cff_off00004514.bin` `2fdaebfa5e4095201467a640291ec7fd1079f406a4ddcb550159406247bb60d5`	pdf-font-stream	PDF embedded font (cff) at offset 0x4514	6624 bytes
`font_04_cff_off00005c9a.bin` `5fe4e8e4f20e0b10c3c528666dfd9a79cbcddbd9e0ffb8a6ad1c49a0c22f5464`	pdf-font-stream	PDF embedded font (cff) at offset 0x5C9A	4844 bytes
`font_05_cff_off00024c6e.bin` `2b96e83bbb44d36713691a43220681312d8a5dcb56a4fb98f5da716c0ffcf696`	pdf-font-stream	PDF embedded font (cff) at offset 0x24C6E	1588 bytes
`font_06_cff_off00027e8a.bin` `d7838a1a5d6ee07385236cc74221185a7e0ca2d234722066d75a113c87f859e6`	pdf-font-stream	PDF embedded font (cff) at offset 0x27E8A	303 bytes
`font_07_cff_off0002855b.bin` `7fa35482b04df578625e0d0811077c608f3239a5254fb169418f6f5148b6e1e6`	pdf-font-stream	PDF embedded font (cff) at offset 0x2855B	3024 bytes

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