Malicious PDF — malware analysis report

Static analysis result for SHA-256 157a94b851e8e57a…

MALICIOUS

PDF

187.1 KB Created: 2015-08-05 14:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 575f4357e58ddd85ff55a6dcc085ae7b SHA-1: d6d0f2bf2f2713d30f82bf5e2c0c60c8e21a795b SHA-256: 157a94b851e8e57a79d5f667e0c9b18797db448ebfa4e709bc916158007dd761
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics as malicious, specifically for containing a link to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The embedded URL `http://botcraftman.ru/...` is the primary indicator of malicious activity, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the presence of a malicious link suggests an attempt to trick the user into navigating to a harmful site.

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%BD%D1%8E%D0%BD%D1%8F+%D0%BF%D0%B8%D1%88%D0%B5%D1%82+%D1%84%D0%B0%D0%BD%D1%82%D0%B0%D1%81%D1%82%D0%B8%D1%87%D1%8B%D1%81%D0%BA%D1%8B%D0%B9+%D1%80%D0%BE%D0%BC%D0%B0%D0%BD+%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/6//4304/4304804_prikaz_mchs_545_ot_22092009.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304600_skachat_diablo_2_underworld_cherez_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304594_spravka_o_dohodah_v_centr_zanyatosti_obrazec_ukraina.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_off000247fa.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x247FA 3556 bytes
font_01_sfnt_off0002557d.bin
d83ed3d59ce4436d333616634de7cc86ccf40c5d0cdb2f5ae1623226174c10d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2557D 14652 bytes
font_02_sfnt_off000282df.bin
a45d20f075d39a20c9ad40b527a8a463292ea7884bc51f39b6e73ebe7b519429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x282DF 14520 bytes
font_03_sfnt_off0002adb0.bin
9e982ba1df7766f0994a016d6a402d204076a799289fbedbb4b635e5fa7a78a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ADB0 7240 bytes
font_04_sfnt_off0002c2ae.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C2AE 6084 bytes
font_05_sfnt_off0002d243.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D243 3752 bytes

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