Malicious PDF — malware analysis report

Static analysis result for SHA-256 37e6eed58d458275…

MALICIOUS

PDF

185.5 KB Created: 2015-07-23 21:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 02aff0d935616dbc9193a062a6192465 SHA-1: 5aa894bff9932ebd54b710e23b4ffb0dddd7e5d7 SHA-256: 37e6eed58d4582757a74f1fcd39f5685f72387ddc249c23f3f5a189106970383
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 critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL 'http://botcraftman.ru/?lip&keyword=%D0%A0%D0%B0%D1%81%D0%BF%D0%B8%D1%81%D0%B0%D0%BD%D0%B8%D0%B5+%D0%BF%D0%BE%D0%B5%D0%B7%D0%B4%D0%BE%D0%B2+%D0%BA%D0%B0%D0%B7%D0%B0%D1%85%D1%81%D1%82%D0%B0%D0%BD+%D1%82%D0%B5%D0%BC%D0%B8%D1%80+%D0%B6%D0%BE%D0%BB%D1%8B&charset=utf-8' is the primary indicator of malicious intent. No scripts were extracted from this sample, but the presence of the malicious link suggests a phishing or malware delivery attempt.

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%A0%D0%B0%D1%81%D0%BF%D0%B8%D1%81%D0%B0%D0%BD%D0%B8%D0%B5+%D0%BF%D0%BE%D0%B5%D0%B7%D0%B4%D0%BE%D0%B2+%D0%BA%D0%B0%D0%B7%D0%B0%D1%85%D1%81%D1%82%D0%B0%D0%BD+%D1%82%D0%B5%D0%BC%D0%B8%D1%80+%D0%B6%D0%BE%D0%BB%D1%8B&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183174_kursovoy_proekt_po_arhitekture_mnogoyetazhnuyy_zhiloy_dom.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184544_kak_oformit_soderzhanie_v_diplomnoy_rabote.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184398_risunki_dlya_lichnogo_dnevnika_karandashom_dlya_devochek.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000241da.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x241DA 3556 bytes
font_01_sfnt_off00024f5d.bin
691a8ed504835beca4af5265bbe6da41e7bf68bb7fde6df5513d533316314f2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24F5D 14636 bytes
font_02_sfnt_off00027d26.bin
cf606cdc8ecd6b0b3333ed60481ce75c7a7f3e7d35a853591c3ed71fbd7aec07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27D26 14532 bytes
font_03_sfnt_off0002a813.bin
ad559ae205f0ad82bd3ab45e21364200547d4244ae1d8436d573e7bce402984d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A813 6956 bytes
font_04_sfnt_off0002bc3a.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC3A 6084 bytes
font_05_sfnt_off0002cbcf.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CBCF 3752 bytes

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