Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1bce6145c300d18…

MALICIOUS

PDF

353.4 KB Created: 2015-08-21 09:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: bbbf57aef03a877359897bd9d956afd0 SHA-1: dc13e9b202a6805d9baa57e609e1dc3b3c4f8b58 SHA-256: a1bce6145c300d18d01dbe9192b7554e66fb48623d0d55841490cef97be15451
90 Risk Score

Malware Insights

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

The PDF contains an embedded URL that is flagged as a known malicious redirector. The ML classifier also strongly indicates maliciousness. The document body is heavily obfuscated and unreadable, but the primary threat appears to be the redirection to the malicious domain, likely to deliver a malicious payload or conduct a phishing attack.

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%B2%D0%BA%D0%BE%D0%BD%D1%82%D0%B0%D0%BA%D1%82%D0%B5+%D0%BD%D0%B0+%D1%82%D0%B5%D0%BB%D0%B5%D1%84%D0%BE%D0%BD+samsung&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654768_rep_pro_lager_tekst.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654818_svezhie_klyuchi_nod_32_na_90_dney.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654793_premium_access_e_obd_facilecar_diagnostics.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005346e.bin
2734bf78984dbc73bc7ac629d3182d0d1fce3e9586a45924bc076ce19c2ac963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5346E 9472 bytes
font_01_sfnt_off00054f6a.bin
edb534505d0dda729b13aa1dc52ef2240bef5419f2482e46055ddacfecd753f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54F6A 18420 bytes

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