Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b83e6e94ffd779b…

MALICIOUS

PDF

182.8 KB Created: 2015-08-05 13:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: a531f881addf33e41e1567b43ddb4fc7 SHA-1: 3c4b2260764c5732e6f915d35e57ce40bface2c8 SHA-256: 9b83e6e94ffd779b07b562c75a2b57e5f832f50a5fc16a1e5f7d2e908b54a6e4
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector, http://botcraftman.ru/. This indicates the document is likely part of a phishing or malware distribution campaign. The authoring application 'wkhtmltopdf' is not typically associated with malicious documents, but the presence of the malicious URL is a strong indicator of malicious intent.

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=%D1%89%D0%B8%D1%82+%D0%BF%D0%B8%D1%82%D0%B0%D0%BD%D0%B8%D1%8F+%D0%BA1313720000+%D1%81%D1%85%D0%B5%D0%BC%D0%B0&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304647_dryannuye_devchonki_skachat_besplatno_bez_registracii.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304487_kazanorenburg_avtobus_raspisanie.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304495_skachat_igru_papinuy_dochki_2_besplatno_i_bez_registracii.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002392c.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2392C 3556 bytes
font_01_sfnt_off000246af.bin
9963b766485fb554154038376c51ca23d0bfda2fa47373f5b8617040ae8ab12b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x246AF 14168 bytes
font_02_sfnt_off00027373.bin
2a07627deb5fb6630992952c9ecefd8632801fa2f31a29821fa0dd4c89bfcdff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27373 14644 bytes
font_03_sfnt_off00029ec0.bin
504d2099a1c650e7f3c054e203af60f949f2c666c6d80973817883897f955974		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29EC0 6504 bytes
font_04_sfnt_off0002b150.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B150 6084 bytes
font_05_sfnt_off0002c0e5.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C0E5 3752 bytes

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