Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5801f1514ffdbb…

MALICIOUS

PDF

151.1 KB Created: 2008-02-27 16:58:09 +08:00 Authoring application: PScript5.dll Version 5.2 (via Acrobat Distiller 6.0.1 (Windows))
MD5: edbeefde2b67f8bac92b321bff1f96b7 SHA-1: efc685cb50803d472d2875ae9322c67a609e9de4 SHA-256: ae5801f1514ffdbbf82503d20f39aac41b0f7865a07681be448c85771417d490
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript T1204.002 Malicious Link

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2007-5659 (Collab.collectEmailInfo). This indicates the file is designed to exploit this vulnerability to run malicious code. The embedded JavaScript stream, named 'javascript_obj0017_000.js', is likely responsible for further actions, such as downloading additional malware. The ClamAV detection as Win.Trojan.Dropper-82 supports this assessment.

Heuristics 9

  • Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659
    PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (matched in decompressed stream)
  • ClamAV: Win.Trojan.Dropper-82 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Dropper-82
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • 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
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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/xhtml
    • http://www.xfa.org/schema/xfa-data/1.0/
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0017_000.js
a855e1484b6aa802ce0f6f936ba6d5b5bb5556ec34d1f510cb7f17c768fa4311		 pdf-javascript-stream PDF /JS object 17 at offset 0x67D 4622 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 16 eval/decoder/string-building token(s).
stream_007_off00017c14.bin
1cfc389ead1844fa5472fe7e142c829dc559f6a5fa6cb8bb9b8c3f208fff622f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17C14 30304 bytes
icc_00_off00015970.icc
eb03db58ff1f226c83103a11f30b5520f9b68a7ced67daa78992723e3ea0411d		 pdf-icc-profile PDF ICC profile at offset 0x15970 1320 bytes
font_00_sfnt_off0001d14b.bin
d4d133961c39a02c7c4f4a0b2eb08383cf88053aeecc96746f9a23ae66ad210b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D14B 21108 bytes

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