Malicious PDF — malware analysis report

Static analysis result for SHA-256 176a83f239174e27…

MALICIOUS

PDF

368.3 KB Created: 2015-08-28 13:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 4bb9e41fafa548780097e3ae9d814340 SHA-1: 39a288ab77f6de6c2007bdfbcdcdb37e0616c68c SHA-256: 176a83f239174e27fb695e678813283eea14f45ae531da85e08df88280badea1
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is likely intended to host a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, appears to reference a download for 'windows xp sp3 black edition'. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+windows+xp+sp3+black+edition+kittens+cd+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802787_earn__to__die_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4804/4804296_tetrad__po__matematike_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4803/4803263_skachat__programmu__dlya_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000575f1.bin
3d971299dc8e7e0070e61fd58409297a7c80a73a47cd887487fbedbb7afbdc7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x575F1 10640 bytes
font_01_sfnt_off00059321.bin
712764548226aea06c04c5d9056dbdd93350d3a82b1ca92cd323abc6137bc67f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59321 15400 bytes

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