Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7e5803c7681698…

MALICIOUS

PDF

70.2 KB Created: 2021-07-28 00:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 68ced15847f46d7eb4b989e826fc5cec SHA-1: 1abb9fa41e9bf16030149b697ad20ec61f3b8c38 SHA-256: de7e5803c7681698b5bc780f7be80e808295e63ee647c4ea5ef253bf134e2485
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating an attempt to host malicious content or phishing lures. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of a link farm on disposable hosting further supports a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9156

Heuristics 6

  • 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.
  • 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 https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/f5819177a513f82332a7878e2e21b06e/48963140810.pdf In PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/43066895128.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a49a5a625f4---gatikuxakari.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c86ea7045e---74883849779.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/q3l2sf34ddk5nmupeasi5h6v7s/11956157754.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607421a10f935---dilitidadofuxupudenonom.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/fuluveritav.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/63522800984.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5a160ba8f---tipewowuzepekulukaxamonoz.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c166939c90---9635527310.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/22569920558.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/49767140450.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210626060849708873ruw3a4.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/b7027655944328a8fcc32e2a2edddb06/kewinuralim.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77cf57549a---35796069631.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/70506422b23d056d65000f4dd6722dd4/88915725486.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/824f98306789fa263cf4069d001a6da5/97367405111.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/9c3d72aa829cc052492d20e81a4e7e76/liwalafudugotopidulibus.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607338e40249b---7820197103.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160878b18c2069---pepuloxanatifef.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/nufus.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/11670905269.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/vhsu70k6l7m4tkdosj7nehks21/51105381508.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/d34a96420b50fe36929629cd6ae541f2/64774555506.pdfIn PDF document text
    • http://grabnerestriche.at/ranofixixasenofi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=college+basketball+core+workoutsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7A 10660 bytes
SHA-256: 91a0a7ec042c992a5a970ec81e313b06e2ed7634497ea59ddd03b75c948a8df0

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