Malicious PDF — malware analysis report

Static analysis result for SHA-256 613f4f6558c5a10b…

MALICIOUS

PDF

364.1 KB Created: 2015-08-21 09:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: a1c19125eb056e9fcf21b68c33e73f68 SHA-1: bcd6630db8efa0cd370d5d62c8def48bcfd9fad2 SHA-256: 613f4f6558c5a10b0b2a19ff76be99fa36715b00e6347040b7169d91d4e8cacb
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link that redirects to a known malicious domain, indicating an attempt to lead the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector URL is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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%B2%D0%BE%D1%81%D1%81%D1%82%D0%B0%D0%BD%D0%BE%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D0%B5+%D0%BB%D1%81+%D0%B2%D0%BA+%D1%81+m_script+2010+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654819_navitel_dlya_windows_ce_60_torrent_skachat.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//4654/4654716_paola_volkova_most_cherez_bezdnu_kniga_skachat.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056898.bin
b92f13fa4de97286b295e57e94361dc2f1490779dc785399ffccbdd23292ffbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56898 10196 bytes
font_01_sfnt_off000584e6.bin
6eb8557baf91a8828673d27e6fea04497a84fb0b4ba1b5c7d3d7f71c458a4ef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x584E6 13952 bytes

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