Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a4fbd86353249c…

MALICIOUS

PDF

185.6 KB Created: 2015-07-23 20:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: c793f500175b270ce30bbedfb63c18ed SHA-1: 841ae5c3e2d4fbfea1acd1fd08db0bf02b77ea44 SHA-256: a5a4fbd86353249cb36e65b3e09228a6070235c83b2d7e1f1d7056cfa23cf24d
90 Risk Score

Malware Insights

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

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 points to botcraftman.ru, which is identified as a malicious redirector. This suggests the document's primary purpose is to lure the user to a malicious website.

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%80%D0%B5%D0%B0%D0%BB%D1%8C%D0%BD%D1%8B%D0%B5+%D0%BA%D0%B8%D0%BC%D1%8B+%D0%B5%D0%B3%D1%8D+%D0%BF%D0%BE+%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B5+2015+5+%D0%B8%D1%8E%D0%BD%D1%8F&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184412_i_exam_ru_testirovanie_otvetuy.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183248_ir2121_shema.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183203_kursovoy_proekt_torgovuyy_centr.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002416e.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2416E 3556 bytes
font_01_sfnt_off00024ef1.bin
ffc589393dcafc60facab551021ee68f9e6f4042910e05c038d74036cb82d60a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24EF1 14928 bytes
font_02_sfnt_off00027d46.bin
08a607636bdf8d35ae230744369dc6823ba29a73812e70500a0dc148888e695f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27D46 14640 bytes
font_03_sfnt_off0002a87b.bin
21a337f9eb0deefa468ab8da98bca0ad2200598eb6075a83d9938611374f1651		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A87B 6984 bytes
font_04_sfnt_off0002bcb3.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BCB3 6084 bytes
font_05_sfnt_off0002cc48.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC48 3752 bytes

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