Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ad3949f1a9aa3a…

MALICIOUS

PDF

187.0 KB Created: 2015-07-24 05:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: d8143d8c08d1b421af7b265160adc24e SHA-1: a1d3e4780029943ed47faaab6f46758fc2e973e6 SHA-256: a1ad3949f1a9aa3a5a12013e3e7717f74650cb90cf0d7d0b14043ad82224fe72
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link to 'http://botcraftman.ru/'. This URL is likely used to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

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-8788731-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8788731-0
  • 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%BF%D1%80%D0%B8%D0%BB%D0%BE%D0%B6%D0%B5%D0%BD%D0%B8%D0%B5+%D0%BE%D0%B4%D0%BD%D0%BE%D0%BA%D0%BB%D0%B0%D1%81%D1%81%D0%BD%D0%B8%D0%BA%D0%B8+%D0%B4%D0%BB%D1%8F+%D1%82%D0%B5%D0%BB%D0%B5%D1%84%D0%BE%D0%BD%D0%B0&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183183_kurchatovskiy_proekt_shkoluy.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184638_skachat_ct_hack_na_android.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184451_chak_palanik_ucelevshiy_skachat_fb2.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024727.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24727 3556 bytes
font_01_sfnt_off000254aa.bin
7b125fe65ea6b24aa76c26e2b413e9204fdd68f67f87fdc47757d6fd0db95c92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x254AA 15252 bytes
font_02_sfnt_off000283d2.bin
c457fcfaab6f548331a7572fefd0d96ae260c7787e9dff2b51ae1aa36573dbb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x283D2 14468 bytes
font_03_sfnt_off0002ae81.bin
4dbff11b7a5930e731bb4eeedfba4914f333b395c71a144eb95a1f1f8ab490d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AE81 6888 bytes
font_04_sfnt_off0002c25e.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C25E 6084 bytes
font_05_sfnt_off0002d1f3.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D1F3 3752 bytes

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