Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8c605278577d58e…

MALICIOUS

PDF

62.3 KB Created: 2021-06-28 14:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4d3934a7492c4cae55fa568dedc633ca SHA-1: 256fe214c0c709d81d879da276826812d50ef5ca SHA-256: e8c605278577d58e1333f5a34828f8420f81ba899e8761606bd26aa4f02250c9
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, many pointing to compromised CMS uploads and disposable hosting, forming a link farm. Embedded JavaScript streams are also present, suggesting potential execution of malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5356

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 http://aiswaryamatrimonials.com/fck_uploads/file/59661637072.pdf In PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/a613f2ef25c5f41b656366597d2940e2/buvefusabexidisax.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/venukidanori.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4c6fceaee---21651557387.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/29077756138.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/9pm4k5s74t6mqu73dldf1u3me5/11492018287.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d86e386b7---sibidavosebutesix.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fc1b14a56---tesogerafa.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/6e2841bf09838a24f75403d2ec8c6ab7/tujovepawexanugitimu.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/17069486929.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050520272912.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/5b9d97efef33e5e8d11445bff86d41a2/73602954225.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160d5a4e4506ba---3575996515.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf8fa993dd---43818550237.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///28024878255.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/zeliguxanexiwamasuxep.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b656d7ee292---53014754154.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/cs1pc9ien7rlm5lpageiorhdej/ruvotak.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800d14cc80a---surajuboxevub.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/c0b8329f301b7a28195721917e9fad27/17704331637.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a38c358ebd4---jetisow.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ceac7a2619---67626268074.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e40f353ec---64831181577.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/2912m04ep6i2mupatsjdij83j7/rubabasudo.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a569fae7338---21821935120.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=this+is+an+insult+to+mePDF link annotation