Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c71b55c501f6c9…

MALICIOUS

PDF

185.9 KB Created: 2015-07-23 21:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b82db991392c340650058501872a61b3 SHA-1: 7cafe6c8c6f05f2af8eb694cbe1bebfc006ffbe1 SHA-256: 55c71b55c501f6c95ebf01f2b39007fee5da0122274a63f773c6b843b666e65a
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 containing a link to a known malicious redirector. The ML classifier also assigned a high probability of maliciousness. The embedded URL `http://botcraftman.ru/...` is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware download page. No scripts were extracted, and the document body was not parsable.

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=business+vocabulary+in+use+intermediate+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184682_new_roundup_4_teacher_s_book_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184536_skachat_soni_vegas_pro_10_na_russkom.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184671_pin_koduy_na_varfeys_2015_may_rabochie.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a6ba.bin
f299900313f5581907cb6d81bde2d2bf284bae76d6639a084cfabc8e292dd24b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A6BA 7820 bytes
font_00_sfnt_off00023f3a.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23F3A 3556 bytes
font_01_sfnt_off00024cbd.bin
8edce4401165582e26120292e9f4fc38b6af22d071ffc42ab36599c843b3cb08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24CBD 14872 bytes
font_02_sfnt_off00027a9f.bin
2584a16f48c7d06ec6bded9153e9958c51023cda1b92379e5db4ad73d9d1bb5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27A9F 14928 bytes
font_04_sfnt_off0002bdea.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BDEA 6084 bytes
font_05_sfnt_off0002cd7f.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CD7F 3752 bytes

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