Malicious PDF — malware analysis report

Static analysis result for SHA-256 5624d4ae327615d5…

MALICIOUS

PDF

44.3 KB Created: 2021-09-07 02:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 722eb65298bc889277841e866a1ca7fd SHA-1: 617a4749930d4cb8a2de891b8d2b1d564143cd1a SHA-256: 5624d4ae327615d574bde805476079d3ee9fa0bdd7d3e8e3297ff46828cc8892
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is often used to redirect users to malicious websites. Several heuristics indicate the PDF is part of a link farm hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7152

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://ldcpc.com/ckfinder/userfiles/files/wakotaxoxivozer.pdf In PDF document text
    • https://ooo-kenk.ru/userfiles/file/21948134555.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/56009790297.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9419c7493e---xepesadodagoxawogudeloda.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/3352919881.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/sanulakig.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/84710554904.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/39185277335.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161363f3843440---68693632850.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/19up5ruie9aleh5chro9cfjhd9/38584271563.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc4ac8a65c---vaborofu.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/lesanazoj.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/c43b37360f4961a821fe9b6c00b65bd8/vexonasojik.pdfIn PDF document text
    • http://mrmax.ca/clients/9797/File/17378263784.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c346bc5702---35054756195.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/64758206860.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/6aa760f8c453d85c249fd6297a7466e3/mudika.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/damunuligulisopubisa.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cfaaaea75---xelusemapijuronozid.pdfIn PDF document text
    • https://finatwork.com/userfiles/file/pirenesigejelonaxe.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/bugabupuvoduluses.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16100d72259016---pefowinepoxoze.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/r9leeco8e1ljm6cabsisq0eqvv/69241162656.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d6fd2e656f---50306249260.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=march+madness+bracket+2018+pdfPDF link annotation

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