Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d582b39466b86f…

MALICIOUS

PDF

56.5 KB Created: 2021-09-06 10:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0462e269a6d6dbd42fc3770a0022ff40 SHA-1: 9af4ca4fd417badd84e950fa7b790777aa6c3453 SHA-256: f7d582b39466b86fa4a2c2ef5e283d77560b3a3d8a40b69fc7686676d7e986d3
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting. The heuristic firings indicate it's a link farm designed to redirect users, and ClamAV detected it as a phishing trojan. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5927

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 https://coretry.ru/uplcv?utm_term=geotechnical+earthquake+engineering+kramer+pdf+download PDF link annotation
    • http://bogelaipigeon.com/upload/file/41923285606.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/52865552746.pdfIn PDF document text
    • https://sankohomestay.com/userfiles/files/pipagikenefitomifedum.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/02adc258ed347a278cd9d9ed01a2bf6f/94513784873.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/98b3b40a5abe0955fec31020edd3b78e/3363052266.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/11fiev27i0k3vuv234akma94j9/16302863584.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d66f935e734---voravoxe.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/sesesodixopufivifer.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/l979ekj7n8rfhd3m7vufqc0vj9/94908225542.pdfIn PDF document text
    • http://www.alrafeef.com/faisaliya/js/ckfinder/userfiles/files/423333572.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/jerinusamov.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f8ffe8bf032---49879203831.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/3150a251fae008115f40af1e6542fe6b/68826028519.pdfIn PDF document text
    • http://net-marketing.hu/images/files/35217700092.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210828_3D4B0C3A00E5BC4C.pdfIn PDF document text
    • https://studio-september.com/wp-content/plugins/super-forms/uploads/php/files/35e8c5e304edd918d74fa1b4801c93cf/pafujonosapulifozadovof.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071692989bf5---28763251996.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/10812225613.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5a74c14c7---mugumetixolizokivivati.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/pavupi.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/bowovetovujedujezutusaj.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/fopasodivukisefujujinaxig.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09719dcac5---dosekugotukibu.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1629283901.pdfIn PDF document text

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