Malicious PDF — malware analysis report

Static analysis result for SHA-256 da31a8b5ebe99dad…

MALICIOUS

PDF

186.4 KB Created: 2015-07-25 11:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b56932f73c421b6d5e8d0dad107c394a SHA-1: 2e1751d19db6ac51f8b78c22c17829d7caae4179 SHA-256: da31a8b5ebe99dad1b76c8b3eb41cc5533873b4be8e7586e57e4f9a5829d8a8a
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector, http://botcraftman.ru/. This indicates the document is likely a lure to direct users to a malicious website for phishing or malware delivery. No scripts were extracted, limiting further analysis of the execution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D0%B0+%D0%B4%D0%BB%D1%8F+%D0%B2%D0%BE%D1%81%D1%81%D1%82%D0%B0%D0%BD%D0%BE%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F+%D1%84%D0%BB%D0%B5%D1%88%D0%B5%D0%BA+kingston&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4199/4199206_skachat_filmuy_mr4_cherez_torrent_besplatno_v_horoshem_kachestve.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4197/4197322_skachat_programmu_dlya_ispravleniya_oshibok_windows_7.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4199/4199710_pesnya_na_turslet_tekst.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a9db.bin
e8f86979df192bbfb834211d3c96f6542410ff71f4d20604d5811b04b08fd735		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A9DB 7528 bytes
font_00_sfnt_off0002444b.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2444B 3556 bytes
font_01_sfnt_off000251ce.bin
3d22e2d0ae43bf94a9c7a53bfd942a4e055cf1d3d410b340550d129b417381b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x251CE 14304 bytes
font_02_sfnt_off00027ea8.bin
6c4fffee55c7d3960fb6bcf1075fd23aba14c9e0563b766728c987d580c34115		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27EA8 14636 bytes
font_04_sfnt_off0002bff6.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BFF6 6084 bytes
font_05_sfnt_off0002cf8b.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF8B 3752 bytes

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