Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb8a133be0cb499…

MALICIOUS

PDF

76.2 KB Created: 2021-07-30 05:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 433aacb9ba402087cc1586d8fb159756 SHA-1: 54b928dfad2cbf8a4a528a48bf0ad898d8e05da6 SHA-256: beb8a133be0cb499474b83e5d079109d402ae12ed372ea9ca4aaf0a417ec25c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7152

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 http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087113bceb87---wisanirudewezabusepos.pdf In PDF document text
    • http://anhopphat.com/uploads/files/gejededinoruruwotivuja.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/f29e7e80859961e3fb2dc79bb0bf27e1/neluxonikapidijomowava.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aee51ab3711---79453921321.pdfIn PDF document text
    • http://s-moonlight.com/CKEdit/upload/files/mixudobebaxa.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609768fcbab94---33640664436.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/luzanisilinenofusoneruz.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/31474816090.pdfIn PDF document text
    • http://huimao.com/upload/11765041454.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b3a164ef0---72291915729.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/46261842217.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/57477711838.pdfIn PDF document text
    • https://egf.tw/test2/images/file/19043833340.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202107/file/1627020447.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160e5ad1b40b76---86173428524.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609e632872011---dekavuwugorobasi.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/3af7ac08f2e4e513c056047097205c55/49197213087.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160704f396af25---kufonesadamagurupe.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/adcc818f9e40ba1c4148c16d716cf726/tokonuteza.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/dozuxoletafokufative.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0df467493---taluwi.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb52f1f154---tamusutozokinemilipuzarib.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/tg25bvecvg9rvvtp4328h7lbee/nezajam.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/29468104443.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed982426476---fuzuf.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/15533351590.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/9b8a6001006e5a6c3d65ffed14573051/seduninigijuvidamekuxow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=voiced+and+voiceless+sounds+listPDF 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_off0000ef8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001079f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079F 16984 bytes
SHA-256: 8f66997ad30dd572127bb15dc3170777cf342e15d443e1327c41c7e968b3661d

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