Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d9c510aa405861…

MALICIOUS

PDF

384.8 KB Created: 2015-08-20 07:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 8ba72cec61b1f189b9f230032c21a684 SHA-1: 033d40fe44eef21a5cac5dd55520f41ab1e028f5 SHA-256: 14d9c510aa405861b790a462e7adef4d9df314ab2375bd122c80c2849a3d0a89
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a link to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The embedded link likely serves as a lure to download further malicious content or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 3

  • 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 JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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+sims+2+%D0%B0%D0%BD%D1%82%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F+18+%D0%B2+1+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638789_charushin_nikita_i_ego_druzya_rasskazuy_chitat.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638893_sony_vaio_svp132a1cv_drayver_azip.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638846_laskovuyy_may_luchshie_pesni_skachat_torrent.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005bb75.bin
57c778905db1559518874d3900c28379badad02dd71398f929d5ff5358e5275b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB75 8744 bytes
font_01_sfnt_off0005d4f6.bin
e850640090efb069767e2fb96e5e923f16bed55f4397a7a1d76302bc5f100fb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4F6 15508 bytes

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