Malicious PDF — malware analysis report

Static analysis result for SHA-256 0989b116c5764c40…

MALICIOUS

PDF

186.0 KB Created: 2015-08-08 09:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: bd8e39fc76753dc07c0e77a12a9fa814 SHA-1: 335771bd5c53f6b832fb95ade58bb5c46a141bb4 SHA-256: 0989b116c5764c4085028ea26fc25c822bead4e0cf060bac26fc337a29304afc
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to known malicious infrastructure, indicating an attempt to redirect the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

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%BD%D0%B5+%D0%BE%D0%B1%D0%BD%D0%B0%D1%80%D1%83%D0%B6%D0%B5%D0%BD+%D0%BA%D0%BB%D1%8E%D1%87+%D0%B7%D0%B0%D1%89%D0%B8%D1%82%D1%8B+%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D1%8B+1%D1%81+82+windows+7&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384045_skachat_mathcad_dlya_windows_7_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383752_boy_tigrov_v_doline_tom_1_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384203_1s_predpriyatie_81_portable.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_off0002a5da.bin
c146a70ce2965ae8960ff382081c514d3c809e54be5ac793964f21aae32e7df0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A5DA 8124 bytes
font_00_sfnt_off00023f1e.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23F1E 3556 bytes
font_01_sfnt_off00024ca1.bin
4e57316c9c08e4e453626aeb8112dd216222e98aefadd374bd02f171b1a7633e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24CA1 14872 bytes
font_02_sfnt_off00027abd.bin
73b957ed61550335f7211ee4226fb1bd535913ff0d12285bc38521d332efea69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27ABD 14584 bytes
font_04_sfnt_off0002be0b.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BE0B 6084 bytes
font_05_sfnt_off0002cda0.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CDA0 3752 bytes

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