Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50a3fe7a450fe26…

MALICIOUS

PDF

183.1 KB Created: 2015-07-23 21:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 979de564c59b5fa01705acb897db2b75 SHA-1: 683a56fd1718b2882f49bef0efa412c764911741 SHA-256: b50a3fe7a450fe26b8620c68f275849257786b1b6e16aa93fdf730131f274f6a
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, http://botcraftman.ru/, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves luring the user to this external site, likely for phishing or to download further malicious content. No scripts were extracted, and the document body was truncated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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%BE%D0%B4%D1%8B+%D0%BD%D0%B0+%D1%81%D0%B0%D0%B8%D0%BD%D1%81+%D1%80%D0%BE%D1%83+3&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184674_razrabotka_uroka_po_matematike_5_klass_po_fgos.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184460_skachat_panel_vvoda_planshetnogo_pk.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184445_volhovnik_kniga_skachat.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023bbd.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23BBD 3556 bytes
font_01_sfnt_off00024940.bin
efa594b41ab1e1855f3fa02b0ddd97eda7198929da3732f0194386f3d1cc1836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24940 14404 bytes
font_02_sfnt_off00027679.bin
a8e34466c77775282ff35936152e77d2d006e6251a28fa13b9eb6049a2645024		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27679 14468 bytes
font_03_sfnt_off0002a124.bin
18919c0886b6a092d23ca69b5a9a662e919c6159fbde4ccb14f4acf4a01c8413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A124 6216 bytes
font_04_sfnt_off0002b29d.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B29D 6084 bytes
font_05_sfnt_off0002c232.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C232 3752 bytes

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