Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad20217a878baef…

MALICIOUS

PDF

976.5 KB Created: 2005-11-14 13:57:44 +01:00 Authoring application: Adobe InDesign CS (3.0) (via Acrobat Distiller 6.0.0 for Macintosh)
MD5: caf5e758fd3d1bf628081f605de3015d SHA-1: 997cd4e91d8cf1dfe65430cb4912a3040e9c9585 SHA-256: bad20217a878baef5a9749f403aada6757f81860b4df34e87db072b62bd91fd1
366 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 download and execute a Windows executable, which is embedded within the PDF and masquerades as 'test.pdf'. The exploit CVE_2010_1240 is specifically identified, indicating a command execution vulnerability. The embedded artifact 'test.pdf' is identified as a Windows executable, confirming the dropper functionality.

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
  • /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\\test.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/iX/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 19

Files carved from inside the sample during analysis.

FilenameKindSourceSize
Press_Qualitykompimiert.joboptions
7604f0f6c5b2e9d35261f64f552d8e54deaa98668a9b10d77f00a347239c1351		 pdf-embedded-file PDF EmbeddedFile object 639 at offset 0xB1BDB 14609 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 11 long base64-like blob(s).
test.pdf
cfa4f56807405fd36e406688feb970a0d0d4854456ba2da72e4a33a27b01d9ae		 pdf-embedded-file PDF EmbeddedFile object 687 at offset 0xB6F0C 454656 bytes
javascript_obj0688_000.js
b1a09f919e0f5d1c1d284849c9af93bae6fd1411634dfdc491e126f9cd327f3f		 pdf-javascript-stream PDF /JS object 688 at offset 0xF3C7F 53 bytes
font_00_cff_off0000375a.bin
11198bfc21d578724d9c8776a6a015a28512881413f617ff1ed8e8357e8d4e31		 pdf-font-stream PDF embedded font (cff) at offset 0x375A 12987 bytes
font_01_cff_off00006251.bin
5c54343d07d8c6c961f110927be21ddb8f4897ed7008fe6688fd22f0ae3aa464		 pdf-font-stream PDF embedded font (cff) at offset 0x6251 12542 bytes
font_02_cff_off0007ff7e.bin
cb1061f6d5722228b0aa1a4b89f26f758c3cce761a55f7d34f2ad36e169acd50		 pdf-font-stream PDF embedded font (cff) at offset 0x7FF7E 16132 bytes
font_03_cff_off000832bb.bin
498c5720e547abdbcf51cedb79c0a8d16ca98f798fcbc24c88a23cce96cc1a2c		 pdf-font-stream PDF embedded font (cff) at offset 0x832BB 35082 bytes
font_04_cff_off00089166.bin
a8af456d29f9d961c7bd7174173a4b79691c4e7d69ab0379feffcb2a421e00c1		 pdf-font-stream PDF embedded font (cff) at offset 0x89166 8164 bytes
font_05_cff_off0008af31.bin
57a913ecdd50e6b51aa5cf3cbd08a63a89a8218f4ca119df15a500cc4792c141		 pdf-font-stream PDF embedded font (cff) at offset 0x8AF31 16018 bytes
font_06_cff_off0008e276.bin
b4ffb4f2cd59db9e09ed70b6cf16f4313deb78ecb4105f3b2a6ba707be40cee9		 pdf-font-stream PDF embedded font (cff) at offset 0x8E276 17426 bytes
font_07_cff_off00091917.bin
072f73d4a0489420019733c7166cd5935fe070aaee7f7006e365acf1171dc43b		 pdf-font-stream PDF embedded font (cff) at offset 0x91917 29746 bytes
font_08_cff_off00097dcb.bin
393a1f6782bd6afb2e009bf73f4865919c0d1c6bbb55349f34c1cba1e3c53a70		 pdf-font-stream PDF embedded font (cff) at offset 0x97DCB 43205 bytes
font_09_cff_off000987ab.bin
f80da31edfecf774ebe0a1c776df669e1c3bcdaecaba2c1ba0dca6128ac15ea0		 pdf-font-stream PDF embedded font (cff) at offset 0x987AB 5290 bytes
font_10_cff_off00099d29.bin
4a3dd367006db2dd156da3573fd22e3c4ebbdbfede8eb638d23b34e75edd761c		 pdf-font-stream PDF embedded font (cff) at offset 0x99D29 5180 bytes
font_11_cff_off0009b117.bin
165ad6d4f8de14b48ffc205b90c401b9ed60a1d9117fa8a749f02806d3539940		 pdf-font-stream PDF embedded font (cff) at offset 0x9B117 3741 bytes
font_12_sfnt_off0009bec9.bin
08333c4d7d12362b37c7013655813be84d4ed494427685df73eef6db034ae48c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BEC9 71856 bytes
font_13_sfnt_off000a8c3a.bin
49eebd409440beca2418e0aa6e9d532ba6b2145e043986e4d8dc8f97777445b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8C3A 13020 bytes
font_14_sfnt_off000aa8dd.bin
192056ee0429d1ba90cb1be47e4a868923f0e67dc8d0b9e5222f540489464285		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA8DD 14132 bytes
font_15_sfnt_off000ac7dc.bin
9bcd2e67d99e7be7dd173f2a1da70eed9c8dde79a75c9d20eef12d38d47f0b21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7DC 25096 bytes

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