Malicious PDF — malware analysis report

Static analysis result for SHA-256 1582a8bda9597bac…

MALICIOUS

PDF

363.4 KB Created: 2015-08-20 08:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 1349b9d9ba30cb33343db61cc6db34e8 SHA-1: f69713510c0feee114cd8d7f4e4a0e7948dadf9d SHA-256: 1582a8bda9597bac023ea2801dcfd5d5cd151e29e0e0dba6d9e0cee80228169f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF with high confidence. While no scripts were directly extracted, the presence of a malicious URL strongly suggests a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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%A1%D1%82%D0%B8%D1%85+%D0%B2+%D0%B4%D0%B5%D0%BD%D1%8C+%D1%80%D0%BE%D0%B6%D0%B4%D0%B5%D0%BD%D0%B8%D1%8F+%D1%83%D0%BC%D0%B5%D1%80%D1%88%D0%B5%D0%B3%D0%BE&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639700_skachat_igru_dlya_android_gta_5.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639911_rabochaya_programma_po_matematike_4_klass_fgos_zankov_s_uud.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639406_ramki_dlya_teksta_skachat_besplatno_v_formate_word.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000565c1.bin
18cab95dac8fe8445459d47a3c1f00c398201b3b3f18af89aa9bece8e1b50ff1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x565C1 8812 bytes
font_01_sfnt_off00057f74.bin
e64292093e97dbc6d53066bc4fb269f9e2c5bcc69f34ecffec5916e2efdf24a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F74 14984 bytes

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