Malicious PDF — malware analysis report

Static analysis result for SHA-256 a738894850eff36b…

MALICIOUS

PDF

184.0 KB Created: 2015-08-08 11:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b5c85a0c43916328b8ea080b978f7e83 SHA-1: 71c223b8f8471684aa308623fb1e4df41ec55206 SHA-256: a738894850eff36b2b2ea082b96d869b4ee745c5fd4e9520df4677bec8950c67
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL http://botcraftman.ru/?lip&keyword=%D0%9D%D1%84%D0%BF+2013+%D1%82%D0%B0%D0%B1%D0%BB%D0%B8%D1%86%D0%B0+%D0%B1%D0%B0%D0%BB%D0%BB%D0%BE%D0%B2&charset=utf-8 is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware download page. No scripts were extracted, and the document body was not parsable.

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%9D%D1%84%D0%BF+2013+%D1%82%D0%B0%D0%B1%D0%BB%D0%B8%D1%86%D0%B0+%D0%B1%D0%B0%D0%BB%D0%BB%D0%BE%D0%B2&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4385/4385185_skachat_sohranenie_100_lego_marvel.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4385/4385257_gdz_po_russkomu_yazuyku_7_klass_lidmanorlova.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4386/4386969_yunuye_goluye_devochki_modeli.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023df0.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23DF0 3556 bytes
font_01_sfnt_off00024b73.bin
fdfe8538cc85bb90306d6dd781b7011a014d0515c35be036cdfbcfa9f46c1ce4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24B73 14556 bytes
font_02_sfnt_off000278b2.bin
26edd09f47ffa8154d3616f10c0f1163b7dce54fbcefce2fd8c2c8cc03aa46a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x278B2 14468 bytes
font_03_sfnt_off0002a360.bin
02405ff58651c794b77a3bce3834e4ad84492fa106287f81e1e8fcffd90580db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A360 6528 bytes
font_04_sfnt_off0002b603.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B603 6084 bytes
font_05_sfnt_off0002c598.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C598 3752 bytes

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