Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca0ca34c0b1a44a…

MALICIOUS

PDF

183.3 KB Created: 2015-08-08 09:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: cd9c00efc43f28f7240b8b5c1c39c47f SHA-1: db8fa536b15de1103121678ff15c85d47619f1a7 SHA-256: cca0ca34c0b1a44a01b0849162b26369822422b86345bb20ce8c4a622473c75e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a redirector link to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the malicious URL identified by the redirector heuristic. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 2

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://botcraftman.ru/?lip&keyword=%D0%AD%D0%BF%D1%83+71+%D1%81%D0%BC&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383870_himiya_9_klass_gabrielyan_chitat.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384100_skachat_besplatno_bez_regestracii_igruy_na_android.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384237_portable_coreldraw_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023b51.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23B51 3556 bytes
font_01_sfnt_off000248d4.bin
3a65cc3649199c93fad1e8314f214acd6c5ca891a21a1b2c88410c578d92698f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x248D4 15468 bytes
font_02_sfnt_off00027846.bin
c7f333376b236c025092092e746728a63bf4ea7291c29ee4dde2804e548e9ca9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27846 14740 bytes
font_03_sfnt_off0002a3da.bin
4e1acda8e5c347e524a4cbeac296dfab0ba1bd3e44db3a0b34c9b96f05d4b991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A3DA 5672 bytes
font_04_sfnt_off0002b366.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B366 6084 bytes
font_05_sfnt_off0002c2fb.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C2FB 3752 bytes

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