Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d38a1b8d4cb68f…

MALICIOUS

PDF

376.6 KB Created: 2015-08-22 09:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: a7bfe2d0d9d12780657be7d179e04bc3 SHA-1: 5d53a7bae07b196a6a8e017b2cbdb9f009fcc3bf SHA-256: d5d38a1b8d4cb68fb39c0a6d2f2f0936d5b0305043bb1adaef577756bf0fae98
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B8%D0%B3%D1%80%D1%83+%D1%84%D0%B8%D1%84%D0%B0+14+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674695_skachat_maynkraft_080_na_planshet.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674479_skachat_kartuy_dlya_navitel_7000_dlya_android.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674629_swedll32_dll_skachat_besplatno.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00059cce.bin
94b60dd024497c4ba3adb77964b3da057f903812027207cee0af64420fa2a6c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59CCE 8500 bytes
font_01_sfnt_off0005b49d.bin
756515780849f305d209ffc91e7322518c9157ff8ddcd9c023544bb97c0a3321		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B49D 14620 bytes

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