Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfdf22c3f28095f3…

MALICIOUS

PDF

185.1 KB Created: 2015-07-26 09:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: d660754fb3332699c8429360cfe003de SHA-1: c236115f38625251c90d6400eb3aa7d5e013f4ea SHA-256: dfdf22c3f28095f35b1d781957f158f94536bc827fdaf2f851e4fd02a9fa5f98
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical alert for a malicious redirector link. The ML classifier also assigned a high probability of maliciousness. The primary malicious IOC is the URL http://botcraftman.ru/, which is likely used to deliver a secondary payload or redirect to a phishing site. No scripts were extracted, but the PDF structure and the redirector link strongly indicate a malicious intent.

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-7494973-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7494973-0
  • 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%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE%D1%8D%D1%84%D1%84%D0%B5%D0%BA%D1%82%D1%8B&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4200/4200952_vuykup_nevestuy_scenariy_v_chastnom_dome.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4203/4203275_playmemories_home_dlya_windows_xp.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187304_skachat_baidu_root_rus_by_sephiroth.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023f44.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23F44 3556 bytes
font_01_sfnt_off00024cc7.bin
8b353603adb081b862a4f3058d7fa4d3e794e513de1b0cacb22230c81207beb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24CC7 15392 bytes
font_02_sfnt_off00027bd0.bin
82e1ef65e79e4858764d30489de1a6bb262c3a4ae3ff71e2763dbba2a8765446		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27BD0 14468 bytes
font_03_sfnt_off0002a684.bin
cb6f197c5d5294e1e71857069817e00942cd7be2712ae121312b394ec8b60434		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A684 6984 bytes
font_04_sfnt_off0002bac2.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BAC2 6084 bytes
font_05_sfnt_off0002ca57.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA57 3752 bytes

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