Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4e1811db96a597…

MALICIOUS

PDF

188.4 KB Created: 2015-07-25 12:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 376816e173997bca62de99f54c741f58 SHA-1: 65823028098e139098d03b9977768719759e1a49 SHA-256: aa4e1811db96a5978af1fb62325662d54e8c5d9045956a6e95d21be036b2247b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to botcraftman.ru. This indicates the document is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7526875-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7526875-0
  • 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=%D1%80%D0%B5%D0%B7%D1%83%D0%BB%D1%8C%D1%82%D0%B0%D1%82%D1%8B+%D0%B5%D0%B3%D1%8D+%D0%BF%D0%BE+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC%D1%83+%D1%8F%D0%B7%D1%8B%D0%BA%D1%83+2015+%D0%BD%D0%B8%D0%B6%D0%B5%D0%B3%D0%BE%D1%80%D0%BE%D0%B4%D1%81%D0%BA%D0%B0%D1%8F+%D0%BE%D0%B1%D0%BB%D0%B0%D1%81%D1%82%D1%8C&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191640_skachat_gta_5_na_pk.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4202/4202933_bars_portable_201112_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192588_skachat_knigi_v_jar_formate_na_telefon.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000249a0.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x249A0 3556 bytes
font_01_sfnt_off00025723.bin
dc5f6d443a671d733dd2e39c8042bef9fbe50220d799c3beb5740e11e14a2128		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25723 15268 bytes
font_02_sfnt_off000285de.bin
9020bfda9f78668ed35139eded94b190e132d312938c9ca3e4a76860067ff562		 pdf-font-stream PDF embedded font (sfnt) at offset 0x285DE 14640 bytes
font_03_sfnt_off0002b115.bin
8b6754f2fca0f16b69a7bf12ba56c888125d3885610f097c95b1d05a7e18abbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B115 7676 bytes
font_04_sfnt_off0002c7cc.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7CC 6084 bytes
font_05_sfnt_off0002d761.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D761 3752 bytes

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