Malicious PDF — malware analysis report

Static analysis result for SHA-256 14961a238e9164d5…

MALICIOUS

PDF

354.6 KB Created: 2015-08-27 09:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 62836fec6f73a6b23ae23f9ea4a7788e SHA-1: 90d978fb4feedd123d2b97267ee542160979373c SHA-256: 14961a238e9164d56fcecc2d5db60a807408acacb99eef1aba63fd80e27efa13
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a critical heuristic for containing a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/..., is the primary indicator of compromise, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the presence of a malicious link is sufficient to infer an attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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=%D1%82%D0%B5%D0%BB%D0%B5%D1%84%D0%BE%D0%BD%D0%BD%D1%8B%D0%B9+%D1%81%D0%BF%D1%80%D0%B0%D0%B2%D0%BE%D1%87%D0%BD%D0%B8%D0%BA+%D0%B4%D0%B7%D0%B5%D1%80%D0%B6%D0%B8%D0%BD%D1%81%D0%BA&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4771/4771848_skachat__pesni__milen_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4771/4771871_ognennuyy__perst__skachat_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4771/4771965_drayver__nvidia__physx_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053d26.bin
61e76553966c92967d218257e449618338406b29b7cc16c57bcd51685467cb57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D26 9128 bytes
font_01_sfnt_off00055673.bin
7711a5b7419ed912534f8eb1651c0046bebeaa4acc6a808c306103a550bb0401		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55673 17620 bytes

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