Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57cd2dafbae0e55…

MALICIOUS

PDF

185.3 KB Created: 2015-08-08 13:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e7c7e63a0bdf2d324df3c4374afc1e51 SHA-1: d47e555aac5f8b8dee9c06aa80232f1be43ea293 SHA-256: a57cd2dafbae0e551af487d824cc1c2f7a3797b8fe9eae597ae53d298a6aac72
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, botcraftman.ru. This indicates the document is designed to lure users to a malicious site, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

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=europa+universalis+4+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+%D0%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4385/4385557_igruy_na_symbian_94_360x640_sis_skachat.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4389/4389739_blank_protokola_proverki_znaniy_po_yelektrobezopasnosti.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4385/4385016_sweet_home_3d_onlayn_na_russkom.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a614.bin
8c67a8e4a59f43bd5e009db18aff37dd001f91b73942c8c76b7b59f53c8a21da		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A614 7316 bytes
font_00_sfnt_off00023ffb.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23FFB 3556 bytes
font_01_sfnt_off00024d7e.bin
ec7d9a2d16f1094c44bb0438c54cff2d2a501ce90afb9c481d2a087b25bacc99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24D7E 14812 bytes
font_02_sfnt_off00027b31.bin
76a114f36b10913d60a2767351f33e88a5931484123a9873eb20960b8b47c829		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27B31 14516 bytes
font_04_sfnt_off0002bb7f.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB7F 6084 bytes
font_05_sfnt_off0002cb14.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB14 3752 bytes

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