Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f60526e2408d84…

MALICIOUS

PDF

184.4 KB Created: 2015-08-06 12:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 9aec742190a0ec596c37d0ed3c39d331 SHA-1: a0527448bc88cb69f850824ed4157f30c79ebceb SHA-256: 52f60526e2408d8488bf39c055b921d804a1fa77607f5276987f2393ee4fe28b
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. This indicates the document is designed to lure users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

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%BA%D0%B0%D0%BA+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%81+app+store+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4306/4306154_konspekt_zanyatiya_po_matematike_v_detskom_sadu.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4306/4306165_root_prava_na_android_412_lg_l7.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304721_programma_dopolnitelnogo_obrazovaniya_v_shkole.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a336.bin
999e12e364eaab8860e0de33d2e955cd522ef35b8d0704dea322a109d2ae3804		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A336 7128 bytes
font_00_sfnt_off00023db0.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23DB0 3556 bytes
font_01_sfnt_off00024b33.bin
75a1e1b396032f90e1a44b774fa30cce236201c5f3dac99031cfa92d2f812c00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24B33 14508 bytes
font_02_sfnt_off00027822.bin
144f0da4c48e080eec3e1576bb28f2adcd710a68c280557e24fb2e34c5820b51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27822 14576 bytes
font_04_sfnt_off0002b7d7.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B7D7 6084 bytes
font_05_sfnt_off0002c76c.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C76C 3752 bytes

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