Malicious PDF — malware analysis report

Static analysis result for SHA-256 db56809f04e26214…

MALICIOUS

PDF

370.5 KB Created: 2015-08-19 21:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: f9acbf7c775af2ecaee2cb4d2e71bec0 SHA-1: ce24d4e20a419bc7e081fe2ee03f682cf004b556 SHA-256: db56809f04e26214cbaead91ee4ac2fa0e213cd75f600e054cd0435ac878bce6
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The primary IOC is the malicious URL, which is likely used to deliver a secondary payload or redirect to a phishing page. No scripts were extracted, limiting further analysis of the execution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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%92%D1%8B%D0%BA%D1%80%D0%BE%D0%B9%D0%BA%D0%B0+%D1%87%D0%B5%D1%85%D0%BB%D0%BE%D0%B2+%D0%BD%D0%B0+%D1%81%D0%B8%D0%B4%D0%B5%D0%BD%D1%8C%D1%8F+%D0%B0%D0%B2%D1%82%D0%BE%D0%BC%D0%BE%D0%B1%D0%B8%D0%BB%D1%8F+%D0%BB%D0%B0%D0%B4%D0%B0+%D0%B3%D1%80%D0%B0%D0%BD%D1%82%D0%B0&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4629/4629206_rezultatuy_gia_po_matematike_2015_9_klass_po_pasportu_onlayn.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4630/4630254_angliyskiy_yazuyk_voskovskaya_karpova_reshebnik.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4629/4629641_amfetamin_recept_prigotovleniya.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000581a6.bin
a5e586d0100a8dd45940d64868475f37ba8eb986c88f46978aafd7d127b15513		 pdf-font-stream PDF embedded font (sfnt) at offset 0x581A6 9752 bytes
font_01_sfnt_off00059d3d.bin
b35695078865435e40167bc4aa46f4380fcf9e9b090fe1325c8c00772860b6e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59D3D 13996 bytes

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