Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c939d18760279f…

MALICIOUS

PDF

185.6 KB Created: 2015-07-26 00:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 1f63dd7bbf22e5bafe2699ff50b574cb SHA-1: cb6f21806926f3c4cf0e906ae3f86cb5b6b868b1 SHA-256: d4c939d18760279fcfa894260fc140b5033e4b15095d5354038f15e8cec703b0
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector, http://botcraftman.ru/. This suggests the document is designed to lure users to a malicious website. The authoring application 'wkhtmltopdf' is not inherently malicious but can be used to generate malicious PDFs. No scripts were extracted from this sample.

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%A1%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%88%D1%80%D0%B8%D1%84%D1%82%D1%8B+%D0%B4%D0%BB%D1%8F+sony+vegas+pro+10&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4193/4193113_kazaki_2_napoleonovskie_voynuy_skachat_torrent_windows_7.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4196/4196432_pin_koduy_na_varfeys_2015_aprel.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192597_detskie_pesni_o_cvetah_skachat_besplatno.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a5e9.bin
1b38bbe1e0c23fb299e65a0e7546b3cc0c43ea195cdc0255bf76e0b570198bc6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A5E9 7672 bytes
font_00_sfnt_off00023f92.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23F92 3556 bytes
font_01_sfnt_off00024d15.bin
c986b6f2c9fe23af3a4107e897b0e5eb11cd7df21c860ee1b021269b9fe65101		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24D15 14744 bytes
font_02_sfnt_off00027ae1.bin
7410ee004213237b2b8432b3a4953dc63493ea369e9d547b7e5e68776e32c439		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27AE1 14572 bytes
font_04_sfnt_off0002bc91.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC91 6084 bytes
font_05_sfnt_off0002cc26.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC26 3752 bytes

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