Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7997e4b4018abe…

MALICIOUS

PDF

356.9 KB Created: 2015-08-28 11:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 88f2c0e6a2571380ab1b0840d5603550 SHA-1: 6d3720e92e880b210f3ee654da3e0d627a8e2618 SHA-256: 6c7997e4b4018abe0e4fcdfec2da7311e1858c6b4b4342d189f1ea958f91e04e
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL is likely the primary mechanism for delivering a subsequent payload or leading the user to a phishing page. No scripts were extracted, and the document body was unreadable.

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%B3%D1%82%D0%B0+5+%D0%B1%D0%B5%D1%82%D0%B0+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F+%D0%BD%D0%B0+%D0%BF%D0%BA&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802514_dogovor__kupli__prodazhi_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802396_skachat__gangstar__vegas_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802472_family__and__friends_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054868.bin
464ee5c7e34eb5ff84d085ea9668c4e190ced4d801ce47e0c00a1ed8d4d2eb72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54868 8144 bytes
font_01_sfnt_off00056033.bin
6ef72efa4441c188f4e14a2caa0eed2a8a9d1960494d919d30aab43ff0f10135		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56033 17284 bytes

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