Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27ad855efc9ca34…

MALICIOUS

PDF

184.5 KB Created: 2015-07-25 01:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: eff593f6c19a975f2f010510c7d22157 SHA-1: 74256639f076363ddfb4c46d7cc5bc9cd4f43e4f SHA-256: d27ad855efc9ca342531cb6a0fb8b0090af279f51792e07b7558ef675dfe7168
90 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. The ML classifier also flagged this PDF with high confidence. The primary attack vector appears to be luring the user to click the malicious URL, which is likely intended to deliver a second-stage payload.

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%BB%D0%BE%D0%B2%D0%B8+%D0%B2+%D0%BA%D0%BE%D0%BD%D1%82%D0%B0%D0%BA%D1%82%D0%B5+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4188/4188167_ivan_kuchin_vse_pesni_skachat_besplatno_cherez_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4195/4195489_obrazec_pisma_arendodatelyu_o_provedenii_remonta.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4195/4195525_otvetuy_na_voprosuy_k_yekzamenu_na_sudyu.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002405f.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2405F 3556 bytes
font_01_sfnt_off00024de2.bin
0ddf68285979ad2da30b8407f6bdc77e6824d3c62764629e92a7a2497bd55955		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24DE2 14604 bytes
font_02_sfnt_off00027bfa.bin
174a748e656ecd6952924126d2026011874b923e4153d32e46ff3796b1239a0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27BFA 14468 bytes
font_03_sfnt_off0002a6ab.bin
2d87221892a78d53a3b2af1091ae2af86d485faade5b40687486787aae17e7d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A6AB 6236 bytes
font_04_sfnt_off0002b833.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B833 6084 bytes
font_05_sfnt_off0002c7c8.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7C8 3752 bytes

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