Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a5b9ef3c6759ac…

MALICIOUS

PDF

184.5 KB Created: 2015-07-24 00:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 19ae200bce7f568a4a44fbe0f42faded SHA-1: a9348940f368eb2a42171189d462574320c08448 SHA-256: 51a5b9ef3c6759acbfeffd9f9d6e8f40554c6e3312c9953e0b6adad03f133e09
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 detected it as Pdf.Dropper.Agent-7494049-0. The embedded URL points to a known malicious redirector, indicating the document's primary purpose is to redirect users to a malicious site, likely for further exploitation or malware delivery.

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-7494049-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7494049-0
  • 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%BA%D0%BB%D1%8E%D1%87%D0%B8+%D0%B4%D0%BB%D1%8F+kaspersky+internet+security+2013&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185397_skachat_igru_varfeys_2015_cherez_torrent_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186235_windows_xp_sp3_zver_2013_skachat_torrent_besplatno_32_bit.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185562_programma_dlya_didzheev_skachat_cherez_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a2b6.bin
cecdbfc40f03d3fd2920d53ca339b6ec24f18ab7975d8c91c014572462c6bc04		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A2B6 7268 bytes
font_00_sfnt_off00023cb9.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23CB9 3556 bytes
font_01_sfnt_off00024a3c.bin
232fa61daf5aa4078eebfe7273951ffe238ffd4d0763a25f77d56528514c0331		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24A3C 14604 bytes
font_02_sfnt_off000277b4.bin
10a0c51bd1ed42278936057e91c514a796b1463cbae41234e465e154bf3d6471		 pdf-font-stream PDF embedded font (sfnt) at offset 0x277B4 14576 bytes
font_04_sfnt_off0002b80a.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B80A 6084 bytes
font_05_sfnt_off0002c79f.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C79F 3752 bytes

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