Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc386c5e3df6bb8f…

MALICIOUS

PDF

188.4 KB Created: 2015-07-24 05:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6) First seen: 2020-12-25
MD5: 5b2dd7daa33bcc523e9cc9156084017e SHA-1: 50900d787db2d5e2b5ca86c95d8668f776c27437 SHA-256: bc386c5e3df6bb8f9ad0f1edddde58145fe8ce87b235f00bb452b7b693c8e8a0
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, specifically for containing a link to known malicious redirector infrastructure. The embedded URL is likely the primary mechanism for delivering a secondary payload or directing the user to a malicious site. No scripts were extracted from this sample, but the presence of the malicious link is sufficient evidence of malicious intent.

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%BF%D0%B4%D0%B4+%D0%B2%D0%BE%D0%B6%D0%B4%D0%B5%D0%BD%D0%B8%D0%B5+%D0%BF%D0%BE+%D0%B3%D0%BE%D1%80%D0%BE%D0%B4%D1%83+2015+%D1%81%D0%B8%D0%BC%D1%83%D0%BB%D1%8F%D1%82%D0%BE%D1%80+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8 In PDF document text
    • http://fastpic.ru/In PDF document text
    • http://www.liveinternet.ru/clickIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184708_xray_16_engine_skachat.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/5//4188/4188569_skachat_filmuy_besplatno_cherez_torrent_fantomas_vse_serii.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185526_programma_dlya_ozvuchivaniya_teksta_na_russkom_yazuyke.pdfIn PDF document text
    • http://www.microsoft.com/typography/fonts/In PDF document text
    • http://www.microsoft.com/typography/fonts/YouIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24B68 3556 bytes
SHA-256: 880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281
font_01_sfnt_off000258eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x258EB 14692 bytes
SHA-256: 4a00cf2ec83724cbc354112e2b92482d44003d448e613bc07baf5179605ee4ef
font_02_sfnt_off00028684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28684 14640 bytes
SHA-256: c98746c72ba12093553cfdc9610d640a14d01e0355ff21fb1202a3b042283a69
font_03_sfnt_off0002b1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B1B8 7456 bytes
SHA-256: 2ceefc81ab34b16ea9705f59310997850c3715344d47a3276d8737af5a0e4a0b
font_04_sfnt_off0002c7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7AB 6084 bytes
SHA-256: 819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3
font_05_sfnt_off0002d740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D740 3752 bytes
SHA-256: 9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e

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