Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a0295ebd01f10b…

MALICIOUS

PDF

341.2 KB Created: 2015-08-28 17:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: ef279228f8b972127fffff4caec2f0e8 SHA-1: 78529a5fe5c2bbfaa786163f4bf4238a03c7b509 SHA-256: c5a0295ebd01f10b83d34919a8fdff5d17681652e009f9581bb50bd281c14104
90 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'http://botcraftman.ru/'. This URL is likely used to lure users to a malicious site for phishing or to download further malware. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was unreadable, but the presence of the malicious URL is sufficient evidence for this assessment.

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%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B8%D0%BD%D0%B0%D1%80%D0%BD%D1%8B%D0%B9+%D1%84%D0%B0%D0%B9%D0%BB&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809218_raspisanie__avtobusov__kamenka_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809215_windows__7__aktivator_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809241_skachat__chervyachki__4_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00050d44.bin
2207883788d5a761687f7879cb9cbedb8af77b8abe1807a1a39311809757f7fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50D44 7636 bytes
font_01_sfnt_off00052310.bin
b62d5da378b1d11df71ce4042b76925480eb576421a17ac0b55d71eafebd79bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52310 16432 bytes

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