Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb06beab1ed32f92…

MALICIOUS

PDF

81.7 KB Created: 2021-09-18 15:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b9cb9dd3c76f8fe0c84fc610735774ae SHA-1: 638c5b94366b771b3bec6b8b3b6771869974173b SHA-256: fb06beab1ed32f92526811bb6b1850b753a7bc5f9946e6f78daacd24807c1d22
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users. The presence of multiple external URIs, including links to compromised WordPress sites and link farms on disposable hosting, strongly suggests a phishing or malware distribution campaign. The ClamAV detection further confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3253

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://banglenhospital.com/UserFiles/File/46248793752.pdf In PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/regojilajiwuz.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/nuzavogozogu.pdfIn PDF document text
    • https://e-midas.ro/files/file/45910003376.pdfIn PDF document text
    • http://jobcred.com/rk/jobcred/uploads/image/file/40793455768.pdfIn PDF document text
    • http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/88395211830.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16135eb90b9924---kozexujoxobuxudefemo.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/59045951398.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/nezabi.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/gepisobanugatukeni.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/dugapewe.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/161452b7de053e---37167597540.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7c092b4b7---7577143373.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/53734632526.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/muzixubobesujuzibowilulek.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143990e6b0a0---2030977611.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/muniguzovubokikigoxedapa.pdfIn PDF document text
    • https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/lopolozugokatik.pdfIn PDF document text
    • https://chsins.tw/uploads/files/202109050501554063.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/805969649.pdfIn PDF document text
    • http://fuyu.010bi.com/ckfinder/userfiles/files/nisesoxupunofasojixix.pdfIn PDF document text
    • http://hzqljsj.com/images/upload/File/pokusubozazi.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/naxuxexoranerav.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/wojatulowatexomaleveg.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/96641542545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+install+apktime+on+firestickPDF 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_off0000eb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10381 18868 bytes
SHA-256: 7c891b51df5e7212bfd2c030313d023ebae565f6b77e354e2bea37037e7bbd3f