Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53b317ebc2bd1c1…

MALICIOUS

PDF

358.5 KB Created: 2015-08-24 02:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 20f6395f646bf6d05a4322004e2b1fdb SHA-1: 9922fdaab8c9341d8bb43435b3c78a3539dddd87 SHA-256: d53b317ebc2bd1c1539a53aebcd94b3716455443065aae0c201f85f4306ec343
92 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a redirector link to a known malicious domain. The ML classifier also flagged this PDF with high confidence. The embedded URL http://botcraftman.ru/ is identified as malicious infrastructure. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest a delivery mechanism for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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%9A%D0%BB%D1%8E%D1%87+%D0%BA+%D0%B8%D0%B3%D1%80%D0%B5+%D0%BA%D1%80%D0%B5%D1%81%D1%82%D0%BD%D1%8B%D0%B9+%D0%BE%D1%82%D0%B5%D1%86&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694333_no__flash__dlya_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4695/4695183_skachat__igru__simulyator_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4696/4696095_stalker__chistoe__nebo_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000550e9.bin
9dfe4b37e5b196ab6c24970367e41a8f6df96c6be6d59bb7281053acf450d963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x550E9 9260 bytes
font_01_sfnt_off00056a5f.bin
da8aed9254751e1b984eb261cedfdd6ff0128d7b34a2e5403ca81c73b8f2e05d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56A5F 15828 bytes

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