Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4de32447d2a357d…

MALICIOUS

PDF

185.9 KB Created: 2015-07-23 20:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f3a71f511bcf94e1ff8c3298c6423d19 SHA-1: eaa8eba34723fd766f1c8db84e1c0f3bb94f7165 SHA-256: c4de32447d2a357d10442c861ce8ffab457d538f27d9b9be954f7106451c3539
150 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics as malicious, including a critical finding for a link to known malicious redirector infrastructure. The embedded URL http://botcraftman.ru/... is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample, but the presence of a malicious redirector suggests the PDF is intended to lead the user to a site that will likely deliver a secondary payload or initiate a phishing attempt.

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-7493381-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7493381-0
  • 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%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BA%D0%BB%D1%8E%D1%87+%D0%BA+%D0%B8%D0%B3%D1%80%D0%B5+%D0%BF%D1%80%D0%BE%D0%BA%D0%BB%D1%8F%D1%82%D0%B8%D0%B5+%D0%BE%D0%B1%D0%BE%D1%80%D0%BE%D1%82%D0%BD%D0%B5%D0%B9&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183197_kursovoy_proekt_po_gazosnabzheniyu.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184717_dogovor_kupliprodazhi_avtomototransporta.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184435_nyensi_dryu_prizrak_venecii_skachat_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002441b.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2441B 3556 bytes
font_01_sfnt_off0002519e.bin
c4024bae54b41d0644b8eef5f52b3b257649da1f3811ff6a99c9ab66dd2d3a69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2519E 14656 bytes
font_02_sfnt_off00027f90.bin
4ae165705ecc41720893a92c6e94e3ee89b3be36a12e4a920505046f59c61edc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27F90 14468 bytes
font_03_sfnt_off0002aa3e.bin
16f729cb43245000863698c842c7ddf60fd0590325f7f6520d944a2d79776194		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA3E 6788 bytes
font_04_sfnt_off0002bd9c.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD9C 6084 bytes
font_05_sfnt_off0002cd31.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CD31 3752 bytes

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