Malicious PDF — malware analysis report

Static analysis result for SHA-256 e51e5a39e98171c7…

MALICIOUS

PDF

187.9 KB Created: 2015-08-08 15:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: aa2711e65949e4ebd5fcd3a9e2dab560 SHA-1: e8c1c7278a0e98afc5f0ae8771364f8e2fe7eacf SHA-256: e51e5a39e98171c78e8e3bd942c2dd3eef00e1cb46b1f8502163831f943411de
90 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, specifically for containing a link to a known malicious redirector. The ML classifier also assigned a high probability of maliciousness. The embedded URL is the primary indicator of malicious intent, suggesting the document is a lure to redirect users to a harmful site. No scripts were extracted, and the document body was truncated, limiting further analysis.

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%BA%D0%BE%D0%B3%D0%B4%D0%B0+%D0%B1%D1%83%D0%B4%D1%83%D1%82+%D0%B8%D0%B7%D0%B2%D0%B5%D1%81%D1%82%D0%BD%D1%8B+%D1%80%D0%B5%D0%B7%D1%83%D0%BB%D1%8C%D1%82%D0%B0%D1%82%D1%8B+%D0%B5%D0%B3%D1%8D+%D0%BF%D0%BE+%D1%84%D0%B8%D0%B7%D0%B8%D0%BA%D0%B5+2015&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4393/4393470_scenariy_1_sentyabrya_v_1_klasse_s_prezentaciey.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4387/4387071_shema_yelektrooborudovaniya_vaz_21213.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4390/4390818_muzuyka_na_mobilnuyy_skachat_besplatno.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024872.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24872 3556 bytes
font_01_sfnt_off000255f5.bin
5fe01d1e8073a8c719b1f9bed5bcfa2cd2a357155dee70200cd972fa58f52312		 pdf-font-stream PDF embedded font (sfnt) at offset 0x255F5 14548 bytes
font_02_sfnt_off000283e3.bin
d129b2306b70ce91da7e21aa5dc95ff0e57120c5b3b157257a57119c7bcd55f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x283E3 14640 bytes
font_03_sfnt_off0002af1c.bin
92f5f51ce5400f342414b830c178b01f7c9066d90b480d8b274d002607d91696		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF1C 7636 bytes
font_04_sfnt_off0002c5aa.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C5AA 6084 bytes
font_05_sfnt_off0002d53f.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D53F 3752 bytes

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