Malicious PDF — malware analysis report

Static analysis result for SHA-256 199777effe5798f9…

MALICIOUS

PDF

184.3 KB Created: 2015-08-08 09:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: d12b22a97a00fa5ff66fe2f01356e171 SHA-1: c2302de6273c37a28f0868bcd82741da827fa8e8 SHA-256: 199777effe5798f952859569f041a7c16afd363f190f24ec199f9268d5ea6456
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link to a known malicious redirector infrastructure, indicating an attempt to lead the user to a harmful site. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a dropper. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a 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-8785875-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8785875-0
  • 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=%D0%B4%D0%B8%D1%80%D1%82+3+%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+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384374_skachat_kryaknutuyy_fraps.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384343_scenariy_na_den_rozhdeniya_11_let_devochke.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383802_ulicuy_razbituyh_fonarey_1_sezon_torrent.pdf
    • http://www.microsoft.com/typography/fonts/
    • http://www.microsoft.com/typography/fonts/You

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023fd6.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23FD6 3556 bytes
font_01_sfnt_off00024d59.bin
1e7d9cd50209f50bf124b8dd62312a03789de39eff50a1661636cb452cdc0803		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24D59 14252 bytes
font_02_sfnt_off000279e3.bin
54a9def00a75807df7245774544ce9570a28c7fcb87478bb619e965107c3684a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x279E3 14468 bytes
font_03_sfnt_off0002a48f.bin
ae5a8ac42a7f5f87052c2a3dfebd215ff748ad1f74eedcb66d5486f3add1e35b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A48F 6604 bytes
font_04_sfnt_off0002b76a.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B76A 6084 bytes
font_05_sfnt_off0002c6ff.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C6FF 3752 bytes

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