Malicious PDF — malware analysis report

Static analysis result for SHA-256 81931d307f80607f…

MALICIOUS

PDF

184.3 KB Created: 2015-08-08 09:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f49a55e827ec92d93ee63e092bdeebe3 SHA-1: e787575ae66352bd09bf793cb7edf6ae06a3698f SHA-256: 81931d307f80607feb1254ac713a6b3467fe8a7aee661b18bde3fb8890e915a1
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector. This suggests the document is designed to lure users to a malicious website, likely for phishing or malware delivery. No scripts were extracted, but the presence of a malicious URL is a strong indicator 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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BA%D1%80%D1%8F%D0%BA%D0%BD%D1%83%D1%82%D1%8B%D0%B9+fraps&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384319_skachat_knigi_doncovoy_v_formate_fb2_besplatno_i_bez_registracii.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383953_vin_kod_toyota_rav4.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383798_knigi_na_francuzskom_yazuyke_chitat_onlayn.pdf
    • http://www.microsoft.com/typography/fonts/You
    • http://www.microsoft.com/typography/fonts/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a417.bin
ac147b5a2cd88e334b9379d8715ed1ca2e0d5236087112ee9f619ebef4709123		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A417 6776 bytes
font_00_sfnt_off00023dcd.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23DCD 3556 bytes
font_01_sfnt_off00024b50.bin
ca1508aebca4a9f63d5d8aece927927f73688514f5d5175dfb129fe18d8983ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24B50 14756 bytes
font_02_sfnt_off00027911.bin
2159dfdc8343d0df490095c79faa7963fded615b2161aedaedf5be4d5030e430		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27911 14564 bytes
font_04_sfnt_off0002b78b.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B78B 6084 bytes
font_05_sfnt_off0002c720.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C720 3752 bytes

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