Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1358b4f75c17ec5…

MALICIOUS

PDF

344.8 KB Created: 2015-08-21 09:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: bb798b1385bf4d3ee458144e4f598cfc SHA-1: 82a5a6ae7270ca590c49ea0809348b5bf380bdf2 SHA-256: b1358b4f75c17ec525c060bff48e3ba5b81925d2d86c8111a5444ebcf4459760
90 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to botcraftman.ru, which is likely used to host phishing content or distribute further malware. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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%92%D0%B5%D0%BA%D0%B5%D1%80%D0%BB%D0%B5%D0%BD+%D0%BF%D0%B5%D1%81%D0%BD%D1%8F+%D0%B1%D0%B0%D0%B1%D0%BE%D1%87%D0%BA%D0%B8+%D0%BD%D0%BE%D1%82%D1%8B&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654841_acdsee_pro_5_skachat_besplatno_russkaya_versiya_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654769_1s_dokumentooborot_8_skachat_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654842_skachat_programmu_dlya_uluchsheniya_kachestva_pesen.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00051953.bin
3406070d77a4296b384c4a7434c81fb64344b36ff11f9d7f10b5096e6edab082		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51953 8880 bytes
font_01_sfnt_off0005327d.bin
a3e51437174d25c5117a90550c75c66889395bc6a8ecee45ddced2af237d8c3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5327D 16188 bytes

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