Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fb698ce3543d2e…

MALICIOUS

PDF

186.8 KB Created: 2015-08-08 09:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 1c75e112d2ade296770a70db47fc6b02 SHA-1: 86499f9e217e3225a2469d8a05b72636f1f8ff48 SHA-256: a4fb698ce3543d2e515d169922922b34589f9622a4488c4612f42109ba390fdb
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/..., is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware download site. No scripts were extracted, and the document body was truncated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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=%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%B0%D0%BD%D0%B3%D0%BB%D0%BE-%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%B8%D0%B9+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE-%D0%B0%D0%BD%D0%B3%D0%BB%D0%B8%D0%B9%D1%81%D0%BA%D0%B8%D0%B9+%D0%BF%D0%B5%D1%80%D0%B5%D0%B2%D0%BE%D0%B4%D1%87%D0%B8%D0%BA&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4279/4279703_dif_avtomat_shema_podklyucheniya.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384184_programma_dlya_nakrutki_repostov.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384046_skachat_dzhon_karter_mp4.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
6aa3fcc01f32e2187e5a89f94ef5c53671949c477e80f07047c7d897e78309de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25647 14076 bytes
font_02_sfnt_off00028270.bin
13af8eda4f1eb8ddfda35002abe8a3efc5fedb23c7efab0af51a2b467e80e8a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28270 14468 bytes
font_03_sfnt_off0002ad26.bin
6977a40277ee0db2cf760df2ed52cf12b12de6a803a683ae8fa98663b58a2ca6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD26 6936 bytes
font_04_sfnt_off0002c13a.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C13A 6084 bytes
font_05_sfnt_off0002d0cf.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D0CF 3752 bytes

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