Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c98a550a9a4a539…

MALICIOUS

PDF

349.8 KB Created: 2015-08-19 14:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: dbb970d09110ecba48a2134ccaa6fd27 SHA-1: 9ed25c81cec026d6879ce9cf427b725374ca9b7b SHA-256: 5c98a550a9a4a53972c815c5d239c41fa97895d2b1387e6549870ca472b66bad
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to botcraftman.ru. While no scripts were extracted, the presence of this malicious URL strongly suggests an attempt to lure the user to a compromised or malicious site. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 2

  • 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.
  • 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%9A%D0%BB%D1%8E%D1%87+%D0%B4%D0%B8%D1%81%D0%BA%D0%B0+quake+4&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626843_rusifikator_fear_3_zvuk.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626712_vinogradnaya_usadba_tureckiy_serial_na_russkom_yazuyke.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626886_microsoft_visio_2007_skachat_besplatno_russkaya_versiya_torrent.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052bb2.bin
934aa529cb95c69c1aa85c9e752064547ab5af7bc32fb0cbfa9e18392fd0151b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BB2 10436 bytes
font_01_sfnt_off00054929.bin
7f34aafc5da9963ec054c6c49c29f02f2f8cc33ac5122d3b6cab4d092e940706		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54929 15176 bytes

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