Malicious PDF — malware analysis report

Static analysis result for SHA-256 657bbde1d132bddd…

MALICIOUS

PDF

187.2 KB Created: 2015-07-24 09:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: c4f10bf526c1858d177f541f67141fe2 SHA-1: 239f58961232f52155a8d998d7075cedd66469c1 SHA-256: 657bbde1d132bddd585236f15e6082c294bf98a0b439ac88b7d97e1d7456ca5f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by multiple heuristics, including ClamAV and an ML classifier. A critical heuristic specifically flags a PDF link to known malicious redirector infrastructure at http://botcraftman.ru/. This indicates the document's primary purpose is to lure the user to this malicious site, likely for further exploitation or phishing.

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.
  • ClamAV: Pdf.Dropper.Agent-7494125-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7494125-0
  • 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%94%D0%B5%D0%BC%D0%BE%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F+%D0%B5%D0%B3%D1%8D+%D0%BF%D0%BE+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC%D1%83+%D1%8F%D0%B7%D1%8B%D0%BA%D1%83+2015+%D1%84%D0%B8+%D0%BF%D0%B8+%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://img1.liveinternet.ru/images/attach/c/5//4189/4189899_skachat_pdd_2015_besplatno_bez_registracii.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185564_wwe_2k14_pc_skachat_cherez_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187657_transkripciya_suruy_yasin_na_arabskom_russkimi_bukvami.pdf
    • http://www.microsoft.com/typography/fonts/
    • http://www.microsoft.com/typography/fonts/You

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000245b9.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x245B9 3556 bytes
font_01_sfnt_off0002533c.bin
e9a3f45f7d2e151e21f8baebb028fb887743208222be92ca4a6626f98f75c681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2533C 14704 bytes
font_02_sfnt_off000281c6.bin
4f5343326ebd6f08477f6581d15698dcc79b7448a19815aae54e3813920313eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x281C6 14640 bytes
font_03_sfnt_off0002ad02.bin
5bbaa9d314564c4657d03c0474bc38eaf6d3116e0850db83e1622ae6ca94b629		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD02 7484 bytes
font_04_sfnt_off0002c31d.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C31D 6084 bytes
font_05_sfnt_off0002d2b2.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D2B2 3752 bytes

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