Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c560325ba7894b…

MALICIOUS

PDF

186.4 KB Created: 2015-07-25 09:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: ecd402e4e0e1e0dfb03fe48cd80885c8 SHA-1: 0bb2d078bdd0ea120d636146a7d96df7141f7b0b SHA-256: 31c560325ba7894bc9d05ab755e5f6665009867bec0b11aedbc51a91edff48b0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple heuristics as malicious, including a critical finding for a link to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL `http://botcraftman.ru/?lip&keyword=kmsonline+v160_183+rurar+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8` is the primary indicator of malicious intent, likely serving as a lure to download further payloads.

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-8786455-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8786455-0
  • 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=kmsonline+v160_183+rurar+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%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/5//4194/4194464_skachat_maynkraft_125_s_50_modami_ot_dragonx.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191550_skachat_chituy_na_vormiks_v_vkontakte_na_rubinuy_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192755_obrazovatelnaya_programma_dou_v_sootvetstvii_s_fgos_po_vasilevoy.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a8d0.bin
82f14a18dd452318b7f740fe1b4b697f1735a58bde1eda55f71f1cecc1d02cae		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A8D0 7716 bytes
font_00_sfnt_off00023fbb.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23FBB 3556 bytes
font_01_sfnt_off00024d3e.bin
d5ca5db43a2b181483cd009f2a09d3f93a037015fa232ed4e2e2b048929238c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24D3E 15376 bytes
font_02_sfnt_off00027d22.bin
b4b6a7f3fe6780e1bf1dd67914c57f710a832b5d0127ee8da777935e19640fbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27D22 14780 bytes
font_04_sfnt_off0002bf9e.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BF9E 6084 bytes
font_05_sfnt_off0002cf33.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF33 3752 bytes

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