Malicious PDF — malware analysis report

Static analysis result for SHA-256 798da5ab49f7ff52…

MALICIOUS

PDF

187.9 KB Created: 2015-07-29 00:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 8b3af1ea0f7221d8fca024a34047c0ed SHA-1: 29677be412230c58dcf5c92753e48fc13bf3e655 SHA-256: 798da5ab49f7ff525eaced6ea31eff8f368869fd7000791ed9dc6c319d321739
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by a machine learning classifier and ClamAV, specifically as a PDF dropper. A critical heuristic detected an embedded link pointing to a known malicious redirector, http://botcraftman.ru/. This suggests the PDF is designed to lure users to a malicious website, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7630608-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7630608-0
  • 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%D1%85%D0%B5%D0%BC%D1%8B+%D1%81%D1%82%D1%80%D0%BE%D0%BF%D0%BE%D0%B2%D0%BA%D0%B8+%D0%B3%D1%80%D1%83%D0%B7%D0%BE%D0%B2+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%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/5//4214/4214445_yelektroshema_kamaz_5320_cvetnaya.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4218/4218723_dzhon_gottman_muzhchinuy_i_zhenschinuy_s_odnoy_planetuy_skachat.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4235/4235221_zapolnenie_dnevnika_po_proizvodstvennoy_praktike.pdf
    • http://www.microsoft.com/typography/fonts/
    • http://www.microsoft.com/typography/fonts/You

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024933.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24933 3556 bytes
font_01_sfnt_off000256b6.bin
0878160c61e20c11b02515d52eeddf6128c09580f58baec6bf5910b4e4e9711e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x256B6 15188 bytes
font_02_sfnt_off0002862d.bin
858de1ea0edee6589051d6c5805376be02fce034b392ea3476abe13984ffa707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2862D 14532 bytes
font_03_sfnt_off0002b11a.bin
6afdcdc13b5f000e6f48df3eb8835bce89438c8e17525e46cb1fb9f106503114		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B11A 7136 bytes
font_04_sfnt_off0002c5e9.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C5E9 6084 bytes
font_05_sfnt_off0002d57e.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D57E 3752 bytes

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