Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8b53764eb15be4…

MALICIOUS

PDF

186.1 KB Created: 2015-07-23 20:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b4da9d07b27481e7de3377b19590c463 SHA-1: 106e6c0c0803f0aefd904b2663570025ff4bac96 SHA-256: da8b53764eb15be447c0ad1d6601ac4aea72e4c994e635a94df40988ee1fe158
90 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The primary IOC is the URL http://botcraftman.ru/, which is associated with malicious activity. The file's metadata indicates it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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%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+%D0%B2%D1%8B%D0%BA%D1%80%D0%BE%D0%B9%D0%BA%D0%B8+%D0%BF%D0%BB%D0%B0%D1%82%D1%8C%D0%B5%D0%B2+%D0%B4%D0%BB%D1%8F+%D0%BF%D0%BE%D0%BB%D0%BD%D1%8B%D1%85&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184427_skachat_oruzheynuyy_pak_na_stalker_zov_pripyati.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184333_krossvord_po_fizike_na_temu_magnitnoe_pole_s_otvetami.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184378_algebra_7_klass_mordkovich_uchebnik_chitat_onlayn.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000244fd.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x244FD 3556 bytes
font_01_sfnt_off00025280.bin
a28269845121eafa3390b1f64392074212a88d9f221b709596ee63d60a6937af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25280 14240 bytes
font_02_sfnt_off00027f36.bin
a6626c0bd3595dc776735a93968cf26fa9368d0e017313712711ccf7ec06347e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27F36 14532 bytes
font_03_sfnt_off0002aa26.bin
02e7ad790fc3241cc60a9a62c36426adb4d68a5cce9de91993a6ec88dbdfd95d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA26 7104 bytes
font_04_sfnt_off0002beb6.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BEB6 6084 bytes
font_05_sfnt_off0002ce4b.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE4B 3752 bytes

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