Malicious PDF — malware analysis report

Static analysis result for SHA-256 842683a440c6eaf7…

MALICIOUS

PDF

21.0 KB Created: 2008-07-02 08:18:27 +04:00 Authoring application: Ovis pdf-RecoverPro (via OpenOffice.org 2.4)
MD5: eabf3f0a2ba86dd26dcf202bc8424a3b SHA-1: 386aa50528f961ba41394f6d5c56d03e10e57ce7 SHA-256: 842683a440c6eaf7533e7af568ce0485e671e2dbd3d4d67b006efa50c9dc6e48
180 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 JavaScript T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identified the use of 'Collab.collectEmailInfo', which is associated with CVE-2007-5659, a known vulnerability in Adobe Reader. The ClamAV detection 'Pdf.Dropper.Agent-7278326-0' further confirms its malicious nature. The presence of a JavaScript object file suggests the script is designed to download and execute a secondary payload.

Heuristics 7

  • 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: Pdf.Dropper.Agent-7278326-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7278326-0
  • 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.
  • 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/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0006_000.js
66f1d88fee57e6fdf1c7421fe675b735056aba06e645613415fd314202d93a58		 pdf-javascript-stream PDF /JS object 6 at offset 0x3FB2 5155 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 16 eval/decoder/string-building token(s).
font_00_sfnt_off000007d4.bin
908558b3049b2238526428de267b64a615dae2c05cc345d6a900f44e80a17bee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4 24488 bytes

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