Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf8e0d52594aafd…

MALICIOUS

PDF

85.9 KB Created: 2021-06-27 00:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 27de8ec8405c1586dc9bc6b57d8162d9 SHA-1: bcdf68b58ba3605326f52c45ad9e4556a5dd9674 SHA-256: 7bf8e0d52594aafd61fb624adfd3ab10ca194c1f100cdbc77769ce865dd3fd50
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as Pdf.Phishing.Trojan by ClamAV, indicating malicious intent. It functions as a link farm, hosting numerous PDFs on compromised CMS upload directories across various domains. These links are likely used to distribute phishing content or further malware stages, potentially leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier clean score 0.2291

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a02dfe710e---zolibakiwuguve.pdf In PDF document text
    • http://security-m.jp/tool/images/file/718657407.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/ebac3c4100fbb3641de03affdf1c5101/67750723114.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d19d2d1845---lagelesorir.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/79b681e2297a9ffad32d31b004e779ed/12627877927.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/169si9v8gph0923rsemj5ub710/78373739777.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/78151191108.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/8f7klg11j6hi5ekr5vqnaq80n6/mexemebaru.pdfIn PDF document text
    • https://drlanda.hu/user/file/56244845462.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5472672b6b---tamepanuwub.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/8c7f4727187f756d50697855c71eaa7e/vutukiwa.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/9iaphnajd0qs7kdngr9gu43bk5/17221956314.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/vefelekoliwobun.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/3mgelrl7ie92h1vovbbq459ukj/81597363991.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/eae5af0cfebe12bffbe2b3f9ba2f869e/gonaji.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4565e41ca1f18b86da056f09c7711aeb/returu.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/mulevagojaralinumudok.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/buduxokilupamozawijobibi.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/ecdcb6d776f14e2e676e115fefcf0323/85878903738.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/o9lchaucs4m9lkqm1pfrqr4nd7/89457069776.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/lonuzulalizejujeg.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ff573c3e8---71278237455.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f254827d7c---57903064936.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b629edd4db0---sajigosatot.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/kemovenoludagiman.pdfIn PDF document text
    • http://vce34.ru/attachments/file/84570349561.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/17/file/20210517_193221_176.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/3c1191b7f7ecf55e3936d3567e1c52ff/45909856338.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=operation+research+book+pdf+for+mbaPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001052d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052D 17576 bytes
SHA-256: 164889f716eb7442e4c0b28cf67bbdd67585966a28dcae1ef3c94a55a8702157
font_01_sfnt_off00013354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13354 11096 bytes
SHA-256: 4e5273a63df75b5ae0e635a21e33241b4bfbed64b5efac79391708a4e5afcf4d

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