Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd11d31319ff6edd…

MALICIOUS

PDF

363.0 KB Created: 2015-08-28 00:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 16a75ef06cd59b8229dabc409c179a15 SHA-1: 37111e4d00d259843521a64d0087b9ffbb93a3c7 SHA-256: fd11d31319ff6eddb0e2f34f0d4ab586e87e912c7200d31869bbc180f85ec830
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to botcraftman.ru, which is classified as a malicious redirector. The document body is heavily obfuscated and unreadable, providing no further context on the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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%BF%D1%80%D0%B8%D0%BA%D0%BE%D0%BB%D1%8C%D0%BD%D1%8B%D0%B5+%D0%BF%D1%83%D0%BA%D0%B8+%D0%BD%D0%B0+%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B8%D0%B4&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788619_otkruyt__fayluy_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788457_skachat__boss__2_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788473_norman__doydzh__plastichnost_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056b4c.bin
888db977b5a5bd3d83886b7a53a1d8422a032763203072c6c8a322cf33af0f58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B4C 7284 bytes
font_01_sfnt_off00058029.bin
b5b3cc7ce54cc87d459f6666a5987b05165a9c0c595a8fe4fbeecfee9e86fcd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58029 14088 bytes

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