Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b83eea592421232…

MALICIOUS

PDF

186.5 KB Created: 2015-08-08 07:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 9ef5e6b9a62c3d9872ff58c427844deb SHA-1: 384469dad602f2779b244235519572d91159ab5b SHA-256: 8b83eea59242123227a6d48f9370923c8a9bda61714a2cf32db6e3823835fcea
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 points to botcraftman.ru, which is associated with malicious redirects. No scripts were extracted, but the presence of a malicious link is sufficient evidence for this assessment.

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%BF%D0%B0%D1%83%D1%8D%D1%80%D0%BB%D0%B8%D1%84%D1%82%D0%B8%D0%BD%D0%B3+%D1%82%D1%80%D0%B5%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%BE%D1%87%D0%BD%D1%8B%D0%B5+%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D1%8B&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4359/4359788_polskorusskiy_slovar_skachat_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4337/4337071_skachat_igru_muhtar_i_ego_komanda_cherez_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4347/4347170_skachat_torrent_tureckiy_serial_zapretnaya_lyubov.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002474f.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2474F 3556 bytes
font_01_sfnt_off000254d2.bin
bed84f1824009fbaec09655e5738fdf1dced5784e4b972eea4d6fba2c4fd480a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x254D2 14452 bytes
font_02_sfnt_off00028221.bin
2faf238a7982558102f008fa2e03cbd823800727545a7f10afda32250c8cbf2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28221 14468 bytes
font_03_sfnt_off0002acd4.bin
fd91af7d52ad53aea50dae971df6b95b1a9714d985f1cfad0c16692c6b752663		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ACD4 6684 bytes
font_04_sfnt_off0002c01e.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C01E 6084 bytes
font_05_sfnt_off0002cfb3.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFB3 3752 bytes

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