Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a676dbb3e539a2f…

MALICIOUS

PDF

184.8 KB Created: 2015-08-05 13:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: c31c1cae97d6b971ab267a2d3fd4d89e SHA-1: 00a664a9d7215bb8fd787c74df531c9242cb0629 SHA-256: 4a676dbb3e539a2f0405d87cf405bdfef37d59df577ef122bb4aa0589e337a83
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector, http://botcraftman.ru/. This suggests the document is designed to lure users to a malicious website. No scripts were extracted from this sample, limiting further analysis of its behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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=%D0%BA%D0%BB%D1%8E%D1%87%D0%B8+%D0%B4%D0%BB%D1%8F+windows+anytime+upgrade&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304446_mikimaus_onlayn_smotret_besplatno_vse_serii_podryad_na_russkom.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304431_payday_2_skachat_torrent_na_russkom_ot_mehanikov.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304434_uzoruy_kryuchkom_dlya_tolstoy_pryazhi_so_shemami.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a3dd.bin
dcd29514277c919c34e04e97c3c2a685b60c6023dbf6c5c931cbeec88279b316		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A3DD 7380 bytes
font_00_sfnt_off00023cbd.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23CBD 3556 bytes
font_01_sfnt_off00024a40.bin
0ae8f6c857930876d4f30c124ca6fb92011c32e6dc6c97b6cffe03d31c79974e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24A40 14940 bytes
font_02_sfnt_off0002781e.bin
5813cc0b2466bb044fd7604773a850a9abf47dcdc5b10e46cba2e425af85e44e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2781E 14816 bytes
font_04_sfnt_off0002b972.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B972 6084 bytes
font_05_sfnt_off0002c907.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C907 3752 bytes

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