Malicious PDF — malware analysis report

Static analysis result for SHA-256 38dd253e3de46968…

MALICIOUS

PDF

186.0 KB Created: 2015-08-08 10:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 2bc6c4b77bd3361fd59aceb57c03d669 SHA-1: d2810e40a54d03ee27c405adbc9ca1c25f6b9390 SHA-256: 38dd253e3de4696851311db8690437c483a23f4d7d684efa5dc893ad8df1c05c
152 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. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to botcraftman.ru, which is identified as a known malicious redirector. No scripts were extracted, but the presence of a malicious link indicates a likely attempt to lure the user to a compromised or malicious 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-7592135-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7592135-0
  • 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=%D0%BD%D0%BE%D1%82%D1%8B+%D0%B4%D0%BB%D1%8F+%D0%BF%D0%B8%D0%B0%D0%BD%D0%B8%D0%BD%D0%BE+%D0%B4%D0%BB%D1%8F+%D0%BD%D0%B0%D1%87%D0%B8%D0%BD%D0%B0%D1%8E%D1%89%D0%B8%D1%85+%D0%B4%D0%B5%D1%82%D0%B5%D0%B9&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384114_otvetuy_k_uz_testam_10_klas.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384758_prikaz_182n_ot_30042013_prilozhenie_1_obrazec_zapolneniya.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4385/4385673_komanduy_kak_sdelat_nik_cvetnuym.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024445.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24445 3556 bytes
font_01_sfnt_off000251c8.bin
670b33e1c3ba93fb7da040b4aeb54ed6653ab265806f0647537be0c267d3dcfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x251C8 14948 bytes
font_02_sfnt_off0002808b.bin
0d208db20fc8acd952c2f95d7d58e323c1f3eeab0b262c64bc0ee55bea4934af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2808B 14532 bytes
font_03_sfnt_off0002ab79.bin
ef1784b05b6815526cf2799f10f2277774a3086a310c835efb314543e60f268a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB79 6556 bytes
font_04_sfnt_off0002be09.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BE09 6084 bytes
font_05_sfnt_off0002cd9e.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CD9E 3752 bytes

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