Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3755bd85c4ed0b…

MALICIOUS

PDF

184.1 KB Created: 2015-08-08 10:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: cd7bcd3774f1c64aff2011ab0ea899b2 SHA-1: f7440ba425d2e072b8a9b49bbfea13f083676857 SHA-256: 2b3755bd85c4ed0b9bdb20302d162bf497752489ccfe003a0ff22b7b5cd8d39f
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 assigned a high probability of maliciousness. The embedded URL points to botcraftman.ru, which is associated with malicious activity. No scripts were extracted from this sample, but the presence of the malicious link strongly 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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%81%D0%BB%D0%BE%D1%82+%D1%88%D0%B5%D1%81%D1%82%D0%BE%D0%B9+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384956_bolnica_moniki_zapis_na_priem.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383754_matematika_3_klass_chast1_muravva_urban_reshebnik.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4385/4385651_yota_root_skachat.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023ec0.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23EC0 3556 bytes
font_01_sfnt_off00024c43.bin
9db7d26e5310a92a9f83d66107b3245b4b10a280ada430c0faaf6c5f79cefd4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24C43 14700 bytes
font_02_sfnt_off000279d5.bin
8c5e5bc4674cee60ec6c1619e60533ff44be00efca6b5f228c587d2f19a61a12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x279D5 14520 bytes
font_03_sfnt_off0002a4a4.bin
93f9ce9e16cac59af34980d46ac8f344643b84c2e27df5dff98f4d3486ecd6f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4A4 6384 bytes
font_04_sfnt_off0002b6bf.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B6BF 6084 bytes
font_05_sfnt_off0002c654.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C654 3752 bytes

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