Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dbf9988d3f51717…

MALICIOUS

PDF

182.5 KB Created: 2015-07-23 21:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6) First seen: 2020-09-24
MD5: f04338ea5d3cb7569fd96999c9e0accc SHA-1: 4d0d9cce8b6e7eef56277a324f74b0df73254199 SHA-256: 3dbf9988d3f517176d60bf6623e1908d7097cd266ca6d85851aa55e0db7e9157
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

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. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=vzlomovod+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8 In PDF document text
    • http://fastpic.ru/In PDF document text
    • http://www.liveinternet.ru/clickIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184704_fallout_new_vegas_gayd_po_prokachke.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184440_kod_aktivacii_dlya_kaspersky_internet_security_2015_na_90_dney.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184810_swat_4_skachat_torrent_na_russkom_yazuyke.pdfIn PDF document text
    • http://www.microsoft.com/typography/fonts/In PDF document text
    • http://www.microsoft.com/typography/fonts/YouIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23825 3556 bytes
SHA-256: 880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281
font_01_sfnt_off000245a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x245A8 14688 bytes
SHA-256: 3057ac1beb91ee865f4c8483b21b88f8f93ac5b257c1bacc40c25b9d43a93d93
font_02_sfnt_off00027320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27320 14788 bytes
SHA-256: e1e1637c855db5907a147cf540366d02a0225d62002100012c297f85b99362b3
font_03_sfnt_off00029eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29EDA 6220 bytes
SHA-256: 6af51a14ccfd357d6850afef3db126666e56da80a0dd71d440d8cee44201e701
font_04_sfnt_off0002b066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B066 6084 bytes
SHA-256: 819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3
font_05_sfnt_off0002bffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BFFB 3752 bytes
SHA-256: 9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e

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