Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ee0fafe4953bff…

MALICIOUS

PDF

84.0 KB Created: 2021-07-01 10:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d77b9157cb891340299340adbed869c0 SHA-1: c85143d00987cca31fb2c81ad3265cdf806d9c9f SHA-256: 80ee0fafe4953bfff1788bb487aa09766b73889ba0a51e7766a0a9cfbe442fde
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's primary function appears to be directing users to external, potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4045

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://nomylo.ru/uplcv?utm_term=transformers+age+of+extinction+480p PDF link annotation
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/ug64fb571j6ec12su9c9ja46md/93350344413.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/789742471de431dbb8bfaccbefe3ddd0/6713823664.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/17813801718.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/xadusinogaxu.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0536b666c8afe0bcdc9f7410f19af67b/xaruzosuwe.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/u0hus4a4a5sh2s08ulilukk08p/gojetanarobirefupipufebow.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608516a136a0a---87501023932.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/45436ccd73e0781fede51dbfb1048684/28517325900.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210607082335.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/6a024f1d7f177fda39b602b49fd7a0b3/mevibozorumatuju.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096dd0d74121---5213032232.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbceac1ba4---7442944327.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/81078fc9dbb1ce2ba060882cc8f51062/forakesugonari.pdfIn PDF document text
    • http://elitvorota.ru/f/file/wovokilobevod.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad92c926f80---zujojuniberafasesa.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adfdcf80838---tujutegewesetuf.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/31955536248.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210616_180630.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f19f30f77---mimisanuzavesepumu.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/3fecrc3u8793n197mp7k62vpm2/fududotemumusivepa.pdfIn PDF document text
    • https://nada70.org/userfiles/file/64372962998.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607241a2178e9---vinumofovatidegujotok.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/sifiwodetiruji.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02A 17924 bytes
SHA-256: 67bb0170e8e123a8d7818db3267799e8c16487d69f58bb93ca8c74cdcc65fca3
font_01_sfnt_off00011f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F93 11252 bytes
SHA-256: f14642d6448e43afec51103b9d7eac272158e6f43f70a060b7a00a71048c13d9
font_02_sfnt_off00013a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1