Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56bd8a5d1afc162…

MALICIOUS

PDF

344.2 KB Created: 2015-08-22 09:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b7de45284dd75e19cc8588855c2e0dd5 SHA-1: 479f6957384e3064cb8d1508efc32f377856fc64 SHA-256: f56bd8a5d1afc1622bc039e6cf3d8a6aff2457c31b0506057aa7cc0189930b02
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. The embedded URL points to 'botcraftman.ru', which is identified as a malicious redirector. ClamAV also detected the file as 'Pdf.Dropper.Agent-8936620-0', indicating its function as a dropper. The document body was truncated and unreadable, but the presence of the malicious URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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-8936620-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8936620-0
  • 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%BB%D0%BE%D1%86%D0%BC%D0%B0%D0%BD+%D0%BA%D0%B1+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674650_scalper_day_v3_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674463_skachat_igru_garrys_mod_13_s_modami_cherez_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674487_bonus_kod_world_of_tanks_2015_na_noyabr.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00051587.bin
29d3a1dd362df4a63aaefb7863b14a243f031590dae452b2a361ff5a570d8bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51587 8044 bytes
font_01_sfnt_off00052c7c.bin
6964109ef3eed6745307dc7f186b43a221b0dde6ffdbbe26e9828b5696450e13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52C7C 17772 bytes

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