Malicious PDF — malware analysis report

Static analysis result for SHA-256 c788f4a5f5d109e5…

MALICIOUS

PDF

362.7 KB Created: 2015-08-28 11:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: e521866dcb61b413e54cd1802935e9c9 SHA-1: 88255a8b2dda6f1e213f30d4012936dc0f92317a SHA-256: c788f4a5f5d109e5a532183ea5fc23963c4319ad66f58e41ae5de1f10f07c1d6
92 Risk Score

Malware Insights

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

The PDF file 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 identified as a malicious redirector. No scripts were extracted, and the document body was heavily truncated and unreadable, preventing further analysis of the specific 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%BE%D0%BB%D0%B4%D1%80%D0%B8%D0%B4%D0%B6+%D0%B0%D0%BA%D1%83%D0%BB%D1%8C%D1%8F+%D0%BA%D0%BB%D0%B5%D1%82%D0%BA%D0%B0+%D0%BA%D1%80%D0%B0%D1%82%D0%BA%D0%BE%D0%B5+%D1%81%D0%BE%D0%B4%D0%B5%D1%80%D0%B6%D0%B0%D0%BD%D0%B8%D0%B5&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802436_notuy__belorusskih_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802393_kak__sdelat__vuykidnoy_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802371_shema__ultrazvukovogo_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056912.bin
98bfd4e42117f1959d90ee2fbcd4c5a9f30f560d53fe683f8e8f08f0a824a8fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56912 8564 bytes
font_01_sfnt_off0005814e.bin
c95c4ed58cc890b937a93bda7d67db435a1dc834fed466940cf46d607fb92dd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5814E 13196 bytes

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