Malicious PDF — malware analysis report

Static analysis result for SHA-256 977118016a94c8e7…

MALICIOUS

PDF

186.2 KB Created: 2015-07-25 03:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: c988ba992737bbb646e7523586cc4cbd SHA-1: c4d9b8ebe0af093fc65f398f4d7aec2c8352be25 SHA-256: 977118016a94c8e720ec4a17d42440e38a9f53e3b0010200707e6e14befa5e4e
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, http://botcraftman.ru/, which is a strong indicator of malicious intent. ClamAV also detected this file as Pdf.Dropper.Agent-8743176-0. The ML classifier also flagged this PDF with a high probability. The primary attack pattern involves luring the user to click the malicious link, likely to initiate a download or redirect to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8743176-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8743176-0
  • 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%84%D0%B8%D0%BB%D1%8C%D0%BC%D1%8B+%D0%BF%D1%80%D0%BE+%D0%B0%D1%84%D0%B3%D0%B0%D0%BD%D0%B8%D1%81%D1%82%D0%B0%D0%BD+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4190/4190885_skachat_binarnuyy_fayl_su_na_android.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192676_simsimi_skachat_na_kompyuter.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4197/4197947_yekzamenacionnuye_biletuy_dlya_ohrannikov_6_razryada_2013.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000244c2.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x244C2 3556 bytes
font_01_sfnt_off00025245.bin
83111d4ad5ee94338f922423936b9427482adcc8548f90e174a6051a25fc7f25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25245 14656 bytes
font_02_sfnt_off00028015.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28015 14468 bytes
font_03_sfnt_off0002aac7.bin
47ddc6264f02d7df1367afff86c8ae05d52e6d1f175202996bccfb69f582dc10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AAC7 6956 bytes
font_04_sfnt_off0002beeb.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BEEB 6084 bytes
font_05_sfnt_off0002ce80.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE80 3752 bytes

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