Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7a47bda0b37aff…

MALICIOUS

PDF

367.4 KB Created: 2015-08-25 22:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: aab2ed8ded5658198597df85086a723d SHA-1: 91b9adffb6d5a540698184d9b95cf5f7475b4b20 SHA-256: ba7a47bda0b37affe1659f4878262cbea76fec9baf95c41aa378eda827544ed6
90 Risk Score

Malware Insights

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

The PDF contains an embedded link to a known malicious redirector, http://botcraftman.ru/, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated and does not provide clear textual lures, but the presence of the malicious URL strongly suggests a drive-by download or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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%B2+%D1%82%D1%80%D0%B0%D0%B2%D0%B5+%D1%81%D0%B8%D0%B4%D0%B5%D0%BB+%D0%BA%D1%83%D0%B7%D0%BD%D0%B5%D1%87%D0%B8%D0%BA+%D0%BD%D0%BE%D1%82%D1%8B+%D0%B4%D0%BB%D1%8F+%D0%B1%D0%B0%D1%8F%D0%BD%D0%B0&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4732/4732473_kms__activator__windows_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4735/4735047_koduy__na__midnight_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4740/4740297_skachat__antikrasher__dlya_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000570da.bin
87573d241b7434ec5c43c4cab01536c92d769e42feebaf0efbb52566d67caa61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x570DA 8688 bytes
font_01_sfnt_off00058a6a.bin
429988cdb1de96f09ce0d8d16fb7c788d393a13ccf305e98d90ba5027bbb512c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A6A 16820 bytes

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