Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f7ea560df719959…

MALICIOUS

PDF

286.8 KB Created: 2015-08-19 16:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-11-21
MD5: 479665c5248c61b98ae0267c4ebab731 SHA-1: 7e6d1280a68555c0ee876581ee2d03c95d2717c6 SHA-256: 4f7ea560df7199595fadc8a5833a753caaeb02ee29406f426f029525b921a7e4
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is designed to lure users into downloading potentially unwanted files or engaging in phishing activities. The ML classifier also flagged the document as malicious. No scripts were extracted, but the presence of a malicious URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7019

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=winusbcompatzip+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8 In PDF document text
    • http://img1.liveinternet.ru/images/attach/c/6//4627/4627092_itogovuyy_test_po_russkomu_yazuyku_8_klass_barhudarov.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626652_skachat_vk_na_telefon_java.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626949_golicuynskiy_grammatika_6_izdanie_skachat.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00043296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43296 9800 bytes
SHA-256: 9d5da934fbfc9044f2afaddab1bc15214755dfbfd4c41560e330fd263c8abf93
font_01_sfnt_off00044d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44D9A 15264 bytes
SHA-256: 26df50e5909c5b4f81958e8011ff3021836eede1b6a2a5f7a18f57ee9372a913

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