Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b6299b1ba8cd7d0…

MALICIOUS

PDF

184.8 KB Created: 2015-08-10 01:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 75983fc587a7eb78df44fe4e8d468396 SHA-1: 56a6b6654a62e4e656e99fa19d11249e2d3999ba SHA-256: 7b6299b1ba8cd7d0bc4c4ab4baf0d44b895e11d616e8ece1f3cff6aa27983377
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a critical heuristic for containing a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious URL suggests the document is designed to redirect users to a harmful site, likely for phishing or malware distribution. The wkhtmltopdf authoring application and embedded fonts are not indicative of malicious activity on their own.

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%B1%D0%B0%D0%B3+%D0%BD%D0%B0+%D0%B4%D0%B5%D0%BD%D1%8C%D0%B3%D0%B8+%D0%B2+%D0%B3%D1%82%D0%B0+5+%D0%BE%D0%BD%D0%BB%D0%B0%D0%B9%D0%BD+116+%D1%81%D0%BE%D0%BB%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4394/4394204_3_ndfl_obrazec_zapolneniya_dlya_ip_nulevaya.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4438/4438260_vkontakte_chit.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4407/4407362_skachat_chit_na_tochnost_dlya_varfeys.pdf
    • http://www.microsoft.com/typography/fonts/
    • http://www.microsoft.com/typography/fonts/You

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023f7d.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23F7D 3556 bytes
font_01_sfnt_off00024d00.bin
c3e596c65bff840ba20d7102ada0ddb426e6fb90eeb4c76e442c51b861bd2a65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24D00 14756 bytes
font_02_sfnt_off00027b3f.bin
43220ef0199a27877c9ce856f8399ad350f787f89d0e93c955d95892034f4539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27B3F 14640 bytes
font_03_sfnt_off0002a675.bin
4d0b64b8af6946e4d726bd89d19581b19f0373f747c642dd0f13ec4cb3ef99e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A675 6616 bytes
font_04_sfnt_off0002b956.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B956 6084 bytes
font_05_sfnt_off0002c8eb.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C8EB 3752 bytes

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