Malicious PDF — malware analysis report

Static analysis result for SHA-256 e57a303b2be5dc2a…

MALICIOUS

PDF

186.5 KB Created: 2015-08-08 09:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 376de6251748da70b73d84cdc4b60899 SHA-1: 0fddb37d0d565a84722fa5b71c76db799ad70f34 SHA-256: e57a303b2be5dc2a6a72ee5b7fb0094a8f464f55252a15d9f18fe4a9396baa6b
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 alert for a malicious redirector link and a high ML score. ClamAV also identified it as Pdf.Dropper.Agent. The embedded URL points to botcraftman.ru, which is known malicious infrastructure. No scripts were extracted, but the presence of a malicious link indicates a likely attempt to lure the user to a compromised site.

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-7620557-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7620557-0
  • 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=knights+of+the+temple+2+%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&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383809_raspisanie_avtobusov_kushva_nizhniy_tagil.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383860_foto_goluye_gimnastki.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383841_obrazec_pisma_sotrudniku_kotoruyy_ne_vuyhodit_na_rabotu.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002aa62.bin
79662541009d4a49624112846f661be462e342629d1908b5f4e54401cba62adb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AA62 7436 bytes
font_00_sfnt_off00024250.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24250 3556 bytes
font_01_sfnt_off00024fd3.bin
ea24f094d7d38adf8cd0b033f541c23a7ea612d8265c30dece40df90e285c4b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24FD3 14800 bytes
font_02_sfnt_off00027e33.bin
df2101ea9422c9437ea88fe3d8d9102ebf508184c56e4de53a971e8d49e5d2d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27E33 15004 bytes
font_04_sfnt_off0002c018.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C018 6084 bytes
font_05_sfnt_off0002cfad.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFAD 3752 bytes

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