Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4eabb35a42b44b…

MALICIOUS

PDF

187.5 KB Created: 2015-07-24 05:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 6142bcad615a8f7fd2e4ca9fbb8c734d SHA-1: 430059ae0c6124540a1ad5f2783c3234baded082 SHA-256: 5f4eabb35a42b44bd3687d0d2697be0267ca6c3a0fa7fc26b9c6b6ee6c47c04d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and the malicious URL suggest an attempt to lure the user to a compromised site, likely for further exploitation or credential harvesting.

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%BE%D0%B1%D0%BB%D0%B5%D0%B3%D1%87%D0%B5%D0%BD%D0%BD%D0%B0%D1%8F+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F+windows+7+%D0%B4%D0%BB%D1%8F+%D1%81%D1%82%D0%B0%D1%80%D1%8B%D1%85+%D0%BA%D0%BE%D0%BC%D0%BF%D1%8C%D1%8E%D1%82%D0%B5%D1%80%D0%BE%D0%B2&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187080_skachat_narezki_na_telefon_besplatno_novinki_2014.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185130_xerox_phaser_3121_drayver_windows_7_x64.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184404_skachat_igruy_na_planshet_besplatno_maynkraft_s_modami_095.pdf
    • http://www.microsoft.com/typography/fonts/You
    • http://www.microsoft.com/typography/fonts/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002ac9d.bin
67115581023a9da451e75381b8dfcce1aa5c8789470ac8a839e1c3d2872afa9f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AC9D 7928 bytes
font_00_sfnt_off000246bc.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x246BC 3556 bytes
font_01_sfnt_off0002543f.bin
1921cb80163738991f562004efbce0de4a72bca601b08a9f727b668f86caaf69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2543F 14608 bytes
font_02_sfnt_off00028140.bin
f33293edd1fde87a848acde533d3d5186e0011822579fa89134a553608cc2d46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28140 14648 bytes
font_04_sfnt_off0002c41a.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C41A 6084 bytes
font_05_sfnt_off0002d3af.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3AF 3752 bytes

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