Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6b5aa81e9c7f79…

MALICIOUS

PDF

186.7 KB Created: 2015-08-05 13:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: cb5f00a513106d77adde134f66e6f597 SHA-1: 848adcb19f3e630f57622af5bcdc27af8e4f0f97 SHA-256: cb6b5aa81e9c7f7942671fe7a0b01141647909196fa78b58f92263f9a98b0d80
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, botcraftman.ru, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The document body appears to be malformed or truncated, preventing a more detailed analysis of its content, but the presence of the malicious URL is sufficient to classify it as a likely phishing or malware distribution lure.

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B8%D0%B3%D1%80%D1%83+star+wars+the+clone+wars+republic+heroes&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304485_porno_onlayn_dlya_androida.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304509_kak_napisat_zayavlenie_ob_uvolnenii_obrazec.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304530_skachat_parkur_mod_dlya_gta_sa.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002ab8b.bin
da127d4afa88a582b56179ffbb1ffbee81bd1715e4b98eff51b36d3036b38b91		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AB8B 7308 bytes
font_00_sfnt_off0002438a.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2438A 3556 bytes
font_01_sfnt_off0002510d.bin
2c72820d351a8879c52775b9e1e6cea9aa0ab55542e97f585e1e5a8a3c7540d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2510D 15036 bytes
font_02_sfnt_off00027fc2.bin
52215607df82848763d3b265311d27fe55b9c2a45c602e647f59c397237d60e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27FC2 14884 bytes
font_04_sfnt_off0002c0fa.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C0FA 6084 bytes
font_05_sfnt_off0002d08f.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D08F 3752 bytes

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