Malicious PDF — malware analysis report

Static analysis result for SHA-256 c31213bd9dd0b838…

MALICIOUS

PDF

184.8 KB Created: 2015-07-23 20:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: c1fc64be9af1a6ad192e788278ffa2b9 SHA-1: 3db969d64e4530cc085e330596e925cdc8f0274b SHA-256: c31213bd9dd0b8381910fd654ab5c153dfc845b1b8d2266ea0743ffbe6a0ff3e
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 infrastructure. The embedded URL `http://botcraftman.ru/?lip&keyword=rus02192012nm3+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8` suggests a lure related to downloading torrents, which is a common tactic for distributing malware. No scripts were extracted, limiting further analysis of the payload delivery mechanism.

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=rus02192012nm3+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184514_adobe_photoshop_cs7_rus_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184330_dogovor_brigadnogo_podryada_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184480_kasting_vudmana_v_rossii_skachat_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a4f3.bin
566851e1f3a8635256050603764625d3bb5b0f3cfb4d72280dc249efe0b8da1f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A4F3 7036 bytes
font_00_sfnt_off00023dab.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23DAB 3556 bytes
font_01_sfnt_off00024b2e.bin
c4455617b294373e11561a5fe359dcaded82c1692df87cde58843b6e8680a570		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24B2E 14912 bytes
font_02_sfnt_off000279cd.bin
875888c01f4342a89fb49fbadbb036e715d78db59f6aa53bf6d4596d5229e1a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x279CD 14632 bytes
font_04_sfnt_off0002b968.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B968 6084 bytes
font_05_sfnt_off0002c8fd.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C8FD 3752 bytes

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