Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb8e1cd618f63fd…

MALICIOUS

PDF

74.0 KB Created: 2021-04-29 07:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c06612eb8f333c443e9d9bfeab268038 SHA-1: 2b98b380a2f1bb672ad7e31ae3258f31a1a9562c SHA-256: 5fb8e1cd618f63fd8e90bb62529ba81bc1e3426cac8371d49f23d3ba191c1feb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous links, many of which point to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7102

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16076f3d317d0e---3103101832.pdf
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/763de14921d794894c49176a1765f079/56263646203.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/h2f3p3gg0f2rulbmfloso5a5so/wefoxibeluzilapetukebi.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/hacfc6pop3s6p5mgqu380h1kd1/dutogotavimikifumofim.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/vasamakugaz.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608242efafff4---juzesemefu.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071a1a402e8d---purifenilixeg.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/3d02b209433fe7fa70e1afa1df4f2ec7/1552808063.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/binoguduk.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e7be2f0b3---33575595286.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/79a405f7837edf820751414344f4f491/judebiveni.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/d87am2pfga8jtlrg719gmr3q7u/zugusivumaba.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606eaf9202803---85062023816.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/8f20c8f167a0243b6dfee6f326964d6e/46924268496.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=informal+education+meaning+in+telugu
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8be.bin
45ee500440d8ca2137e5c6f566e95f5771143ad5be3a85d1c3485cb02d05ebc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BE 5100 bytes
font_01_sfnt_off0000ea00.bin
258d24bbd7a26d584e717f4ea3f6e8daea54bdce1cf526e0885c184710d005d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA00 11668 bytes
font_02_sfnt_off00010834.bin
1207e9bbb28012d61053b831029ed60e7b1e24dc5e59fb6c92f60d101c1bf773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10834 10220 bytes

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