Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8c1f70a3e9fd3a…

MALICIOUS

PDF

186.1 KB Created: 2015-08-05 15:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: cbaf2a62325d2537de3655133527aa83 SHA-1: 300948db0230a5d984acf696b437f3ab92031a44 SHA-256: cf8c1f70a3e9fd3a00947b4c1e4eceeb450ea0f9423713f6c237d14a412eb9bc
90 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. The primary malicious indicator is the embedded URL, which is likely used to lure users to a phishing or malware download site. No scripts were extracted, limiting further analysis of the payload.

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%A1%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D1%83+%D0%BD%D0%B0%D0%BA%D1%80%D1%83%D1%82%D0%BA%D0%B0+%D0%BE%D0%BA%D0%BE%D0%B2+%D0%B2+%D0%BE%D0%B4%D0%BD%D0%BE%D0%BA%D0%BB%D0%B0%D1%81%D1%81%D0%BD%D0%B8%D0%BA%D0%B0%D1%85&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305958_skachat_pesnyu_proschay_shkola_ya_pyu_za_tebya_koka_kolu_tekst.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304490_olimpiaduy_po_russkomu_yazuyku_4_klass_s_otvetami_2015_god.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305302_telefonnuyy_spravochnik_aktyubinska.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024720.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24720 3556 bytes
font_01_sfnt_off000254a3.bin
2cc7f7aaff36d16954a3cac450dda7e21afcc378ab43175bcbe47296a4550082		 pdf-font-stream PDF embedded font (sfnt) at offset 0x254A3 13820 bytes
font_02_sfnt_off00028054.bin
a6626c0bd3595dc776735a93968cf26fa9368d0e017313712711ccf7ec06347e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28054 14532 bytes
font_03_sfnt_off0002ab44.bin
fc43349675377f4fdb10861834be7c0a8c88cd5e66e51fee592f1c93e6995e27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB44 6704 bytes
font_04_sfnt_off0002be9b.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BE9B 6084 bytes
font_05_sfnt_off0002ce30.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE30 3752 bytes

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