Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7fa8d859dd339d…

MALICIOUS

PDF

387.3 KB Created: 2015-08-26 09:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 5bf03596cb975ecb8d47e7360b0abb8f SHA-1: bbb0f304b4dddf700603ed78778902f12559ae2f SHA-256: 5d7fa8d859dd339d70fdb5b4236f6afc44dec270325203f13f405aaa0b45d1b7
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=iron+front+d-day+1944+2015+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751912_kak__udalit__nedavno_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751836_skachat__net__framework_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751838_skachat__besplatno__generator_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005c100.bin
b551a8cac73f83fa996608eae63a24993bbbae5686ae17a35778e2428e15b375		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C100 9908 bytes
font_01_sfnt_off0005dcc6.bin
7ddefabcb011ef240321abd5a2bb2f5fc00d66e4b14257444951ba0c68e88c2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCC6 15928 bytes

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