Malicious PDF — malware analysis report

Static analysis result for SHA-256 287e7c25851a617d…

MALICIOUS

PDF

187.2 KB Created: 2015-07-24 18:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b41971c3fa41be8b5f85e77dea556664 SHA-1: 6456e9542ebc92dbcf15276b8853adfef4ebbae4 SHA-256: 287e7c25851a617de7463b3d7fe4af203740556b229c7ac7ff6abb5368faf74b
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL, http://botcraftman.ru/..., is highly suspicious and likely serves as a lure to a phishing or malware distribution site. No scripts were extracted, but the presence of the malicious link is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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%BC%D0%B0%D0%BA%D1%81+%D0%BA%D0%BE%D1%80%D0%B6+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B0%D0%BB%D1%8C%D0%B1%D0%BE%D0%BC+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191962_obrazec_zapolneniya_dnevnika_po_praktike_inzhenera_mehanika.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185528_cosmopolitan_velikolepnaya_vneshnost_skachat.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191701_kvalifikacionnuyy_spravochnik_dolzhnostey_2014_v_obrazovanii.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000248ff.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x248FF 3556 bytes
font_01_sfnt_off00025682.bin
ad446879ca974c898bfff2a8d7a9ac1206b96e7796620a321c0ed6d5d3d09bc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25682 15024 bytes
font_02_sfnt_off00028554.bin
fbe4af72ea4b6832e02f3a94d39805fe74296d1f62d5d4f3c350b4dd983b7d89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28554 14468 bytes
font_03_sfnt_off0002b002.bin
8ae77c3e8ebfe0b027f3e9c6ccaf8b8af02d650d157ad933059f277ad57db481		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B002 6652 bytes
font_04_sfnt_off0002c30a.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C30A 6084 bytes
font_05_sfnt_off0002d29f.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D29F 3752 bytes

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