Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbacf6e5f4f53bf2…

MALICIOUS

PDF

186.5 KB Created: 2015-07-23 19:54:37 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 051a680e3abc5626ec86ad45a81f87dd SHA-1: 0509e5e011ea296875be5fe6dfc31524c26c1f9d SHA-256: cbacf6e5f4f53bf236e0d8b6ccd77973caec28a5fcc94a18661f6021d19d55cf
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, botcraftman.ru, which is indicative of a dropper or downloader. ClamAV also detected this file as Pdf.Dropper.Agent-8789504-0. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves luring the user to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-8789504-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8789504-0
  • 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%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B8%D0%B3%D1%80%D1%83+%D0%B0%D0%BB%D0%B8%D0%B5%D0%BD+%D1%88%D1%83%D1%82%D0%B5%D1%80+%D0%BD%D0%B0%D1%87%D0%B0%D0%BB%D0%BE+%D0%B2%D1%82%D0%BE%D1%80%D0%B6%D0%B5%D0%BD%D0%B8%D1%8F+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184313_supersu_ne_smog_ustanovit_binarnuyy_fayl_su.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184317_potrm0162001_s_izmeneniyami_2015_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184350_yesse_po_obschestvu_primeruy.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024762.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24762 3556 bytes
font_01_sfnt_off000254e5.bin
53cfcaa52bde68cf4b0bc481881a013bd41cf6af86a7ff19735b77fbcbc8ff16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x254E5 14092 bytes
font_02_sfnt_off00028164.bin
12658dc14dcf6e6dc23370abf5b60f95f55548fb89ccc22118485a62dd2213c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28164 14520 bytes
font_03_sfnt_off0002ac32.bin
ad89b75b0a8a2a93d6a468b1d8a02bf23a58917aef19afebecf5425fd113616e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AC32 6920 bytes
font_04_sfnt_off0002c033.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C033 6084 bytes
font_05_sfnt_off0002cfc8.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFC8 3752 bytes

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