Malicious PDF — malware analysis report

Static analysis result for SHA-256 89fe155611bcefc0…

MALICIOUS

PDF

373.2 KB Created: 2015-08-28 17:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: c7fc93369747e96684c8015c3ceaba9e SHA-1: 7dda2dd388c7339921bf201721fbd5612b80af72 SHA-256: 89fe155611bcefc0f866c93bb55c92f61587ad5c0e7ed1c614a93705cc81c7d4
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for containing a link to a known malicious redirector at botcraftman.ru. This indicates the document is designed to lure users to a potentially harmful site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred solely from the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D1%8B+%D0%B4%D0%BB%D1%8F+%D0%BD%D0%BE%D0%BA%D0%B8%D1%8F+%D0%BD8&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809106_r24001__skachat__obrazec_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809105_skachat__beluyy_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809132_skachat__besplatno__koncert_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000590be.bin
d52d3c32cad7dbe495f9f379020a2bc24e11f286dfa4e326b545ee17b53ab7aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x590BE 7932 bytes
font_01_sfnt_off0005a7c9.bin
0c9d1bb2297fddd8a8bcf8be2590fd3fbef819158a3eea49055d320e9035fddb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A7C9 14220 bytes

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