Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38a1cc76192a213…

MALICIOUS

PDF

371.3 KB Created: 2015-08-22 10:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-09-18
MD5: 8a87a398dc058a1938b74b541a0ab774 SHA-1: 8e77e143f0ab6a1ec1a7996badb9e5c8ce25eda2 SHA-256: f38a1cc76192a213d11fe490106134167e8b6fee785a8e80fd9fbf21dede2cf0
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link to a known malicious redirector, botcraftman.ru. This heuristic, combined with the ML classifier's high confidence, strongly suggests malicious intent. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL is sufficient to infer an attack pattern involving redirection to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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%82%D1%80%D0%B5%D0%BD%D0%B0%D0%B6%D0%B5%D1%80+%D0%BF%D0%BE+%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B5+4+%D0%BA%D0%BB%D0%B0%D1%81%D1%81+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8 In PDF document text
    • http://img1.liveinternet.ru/images/attach/c/6//4675/4675233_okantovki_dlya_pechatey_cdr_skachat.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674527_vadim_panov_dikie_persuy_skachat_fb2.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674653_photoshop_cs7_skachat_torrent_russkaya_versiya.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00058550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58550 9272 bytes
SHA-256: dc2629cb130dacee5afc5cc1ed93fb74c7b28fd238e3b91c92b77c76acec6d4e
font_01_sfnt_off00059f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59F38 15184 bytes
SHA-256: b1b5285bdacc1b8853965d9aa410f0d1fc71bbf67ec390e33dd55f65a2a53a6f

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