Malicious PDF — malware analysis report

Static analysis result for SHA-256 735c3a47f9dc9a44…

MALICIOUS

PDF

186.8 KB Created: 2015-07-24 08:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: c2d3bb759aa2145ccdec33d9891fb6a4 SHA-1: 4725bc804c83be87d84e3ed5eef4015eb3d5b02c SHA-256: 735c3a47f9dc9a441f979665b57cb3d91bc97af2aac514f09c3036485dee6369
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/..., is the primary indicator of malicious intent, likely serving as a lure for further malicious activity. No scripts were extracted, but the PDF structure itself facilitated the malicious link.

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%D1%80%D0%B0%D0%BD+%D0%BD%D0%B0+%D1%82%D0%B0%D0%B4%D0%B6%D0%B8%D0%BA%D1%81%D0%BA%D0%BE%D0%BC+%D1%8F%D0%B7%D1%8B%D0%BA%D0%B5+%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//4188/4188282_skachat_prilozhenie_sberbank_onlayn_dlya_kompyutera.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4189/4189259_outlook_2007_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186142_klyuchi_dlya_trikolor_tv.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_off000246df.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x246DF 3556 bytes
font_01_sfnt_off00025462.bin
4436d2d25e2c8fd10e48b49a0d1776c7e795d87936186bf3c45fc22f68f6b65e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25462 14608 bytes
font_02_sfnt_off000281b3.bin
fbe4af72ea4b6832e02f3a94d39805fe74296d1f62d5d4f3c350b4dd983b7d89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x281B3 14468 bytes
font_03_sfnt_off0002ac61.bin
f396fd16a13c7cd4cd51d560fdea5adc5133ef7bd5e54a8be9faffaefe858101		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AC61 7284 bytes
font_04_sfnt_off0002c184.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C184 6084 bytes
font_05_sfnt_off0002d119.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D119 3752 bytes

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