Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d7ef99549370bae…

MALICIOUS

PDF

187.6 KB Created: 2015-07-24 08:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: dc505d815e4d343aff622540670de9ae SHA-1: 76a8c728de3f446dd1bfa49ebd74c2b0b3ea3bd5 SHA-256: 4d7ef99549370bae82fa2f80ecfb2b38de546a89b70dbd4742bdc80e2c078556
150 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV and an ML classifier. A critical heuristic firing indicates the presence of a malicious redirector link pointing to botcraftman.ru. This suggests the PDF's primary function is to lure users to a potentially harmful website. No scripts were extracted, and the document body was not sufficiently readable to provide further context.

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-7494026-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7494026-0
  • 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%B2%D0%B5%D1%81%D0%B5%D0%BB%D0%B0%D1%8F+%D1%84%D0%B5%D1%80%D0%BC%D0%B0+2+%D0%B1%D0%B5%D0%B7+%D0%BE%D0%B3%D1%80%D0%B0%D0%BD%D0%B8%D1%87%D0%B5%D0%BD%D0%B8%D1%8F+%D0%B2%D1%80%D0%B5%D0%BC%D0%B5%D0%BD%D0%B8&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4188/4188172_skachat_proshivku_dlya_htc_wildfire_a3333.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4188/4188244_rezultatuy_po_russkomu_yazuyku_2015_po_pasportnuym_dannuym.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187124_simcity_goroda_budoscheva_skachat_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000248c4.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x248C4 3556 bytes
font_01_sfnt_off00025647.bin
e73a13b0e53b9f37c5586deadf15c1f39153130bdafd73c02bfd488eb5509b8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25647 14840 bytes
font_02_sfnt_off00028475.bin
1bdb34460530df544f3708516b9bff2a8899c1e4c5605cca86f0484fc167616c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28475 14468 bytes
font_03_sfnt_off0002af27.bin
766998917e2d584b196839489aa849745e31d5aa64306afd69a071a13de028a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF27 7300 bytes
font_04_sfnt_off0002c498.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C498 6084 bytes
font_05_sfnt_off0002d42d.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D42D 3752 bytes

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