Malicious PDF — malware analysis report

Static analysis result for SHA-256 db493a86f14dd16c…

MALICIOUS

PDF

186.1 KB Created: 2015-07-23 20:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: ed47facce78132db3a4a93d12f8c60d9 SHA-1: e2576ef2ded6578a3ed0650ee62da9ca3c56c486 SHA-256: db493a86f14dd16cb890f694036030a43dee29a6d8dc40063aa7feeef4441ce5
152 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Dropper.Agent-8789997-0 and a critical heuristic identified a link to known malicious redirector infrastructure. The embedded URL, http://botcraftman.ru/, is likely used to deliver a secondary payload or redirect the user to a malicious website. No scripts were extracted from this sample, limiting further analysis of its behavior.

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-8789997-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8789997-0
  • 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=%D0%9F%D1%80%D0%B8%D0%BC%D0%B5%D1%80%D1%8B+%D0%BF%D0%BE+%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B5+3+%D0%BA%D0%BB%D0%B0%D1%81%D1%81+%D1%80%D0%B0%D1%81%D0%BF%D0%B5%D1%87%D0%B0%D1%82%D0%B0%D1%82%D1%8C+%D1%81%D1%82%D0%BE%D0%BB%D0%B1%D0%B8%D0%BA%D0%BE%D0%BC&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184457_spravka_o_srednem_zarabotke_dlya_centra_zanyatosti_blank_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184322_the_klub_17_rusifikator.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184545_realnuye_kimuy_egye_po_matematike_2015_5_iyunya.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002452e.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2452E 3556 bytes
font_01_sfnt_off000252b1.bin
e3f501cdf82cfcc3a6d02b95bda905a0c2e55cc6feaa5373afff67ac8724df8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x252B1 14712 bytes
font_02_sfnt_off0002809b.bin
54a9def00a75807df7245774544ce9570a28c7fcb87478bb619e965107c3684a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2809B 14468 bytes
font_03_sfnt_off0002ab47.bin
4b7e4787f68ee0285d7d88e8c7b4b49d64cac39bb1f0214c50ac26972cf1c144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB47 6712 bytes
font_04_sfnt_off0002be82.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BE82 6084 bytes
font_05_sfnt_off0002ce17.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE17 3752 bytes

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