Malicious PDF — malware analysis report

Static analysis result for SHA-256 b333e9a1a7bfc55f…

MALICIOUS

PDF

186.6 KB Created: 2015-08-08 12:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 251da33c89cb9ba4abaadbabbf6c0e51 SHA-1: 1ecea6f11bfdc57a4941303c415f8ffbe2f16c7c SHA-256: b333e9a1a7bfc55f0f33afa9faf8e99fb193a8cb455bfe3d401f997f7e0521fd
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link to botcraftman.ru, which is flagged as malicious. ClamAV also detected this file as Pdf.Dropper.Agent-8794803-0. The ML classifier strongly indicates maliciousness. The primary attack pattern involves luring the user to click the link, which likely leads to a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-8794803-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8794803-0
  • 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%B1%D0%B8%D0%BB%D0%B5%D1%82%D1%8B+%D0%B8+%D0%BE%D1%82%D0%B2%D0%B5%D1%82%D1%8B+%D0%BD%D0%B0+%D0%B4%D0%BE%D0%BF%D0%BE%D0%B3+2013+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%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//4384/4384396_progi_na_nokia_n8_besplatno_bez_registracii.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4388/4388298_skachat_shou_uralskie_pelmeni_vse_vuypuski_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4386/4386776_skachat_igru_skubi_du_i_kitayskiy_drakon.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002462d.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2462D 3556 bytes
font_01_sfnt_off000253b0.bin
e9406c1b27de6ad359af120e67a2476bdd93e7be299e81f96f29a1568c6feaa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x253B0 14564 bytes
font_02_sfnt_off0002813e.bin
c0d5ba9d7e8c22c4fe2bd478f9e1bfd406166d70b5caa7d8b2c8f94fd3697abe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2813E 14468 bytes
font_03_sfnt_off0002abe9.bin
a01c2a904caf70ffaa700b00b7be7ffd6c3ff1d9048b6c3db4dfd3821b6cfd2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ABE9 7112 bytes
font_04_sfnt_off0002c09f.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C09F 6084 bytes
font_05_sfnt_off0002d034.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D034 3752 bytes

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