Malicious PDF — malware analysis report

Static analysis result for SHA-256 81ec42fc1f39c267…

MALICIOUS

PDF

183.3 KB Created: 2015-07-24 07:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f6d2c898c61d7e227da32f2f997e6220 SHA-1: 434ae9fb2c7cbeea733fe4d827b695543fb1d5a4 SHA-256: 81ec42fc1f39c267a16f7ee857f3a3d49923bc95b9dc96f4d3292f3ff04c77ef
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a malicious redirector link pointing to 'http://botcraftman.ru/'. The ML classifier also strongly indicated maliciousness. The file's purpose appears to be directing users to this malicious URL, likely for further exploitation or phishing.

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-8791230-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8791230-0
  • 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%D0%B8%D0%BF%D1%8B+mp4+320+240&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4189/4189851_skachat_film_beluyy_plen.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187884_skachat_igru_ufc_2013_na_kompyuter_cherez_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185000_3000_prichesok_skachat_besplatno.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023c30.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23C30 3556 bytes
font_01_sfnt_off000249b3.bin
c9f59b6e64f93d6ee4372d0b56a0e6bf5ba40de107819ac7064805aed704bf62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x249B3 13884 bytes
font_02_sfnt_off0002759f.bin
4f3a5d3d4cb7515e0b22e9338fd4494579759f063440177437c8dedaa0f2f7f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2759F 14632 bytes
font_03_sfnt_off0002a0bd.bin
b08eb7024bfc56f1592b80b1a52798fa40fe957c2a225ac9eb3db17e1ee943a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A0BD 6580 bytes
font_04_sfnt_off0002b389.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B389 6084 bytes
font_05_sfnt_off0002c31e.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C31E 3752 bytes

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