Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80ea10e027f9260…

MALICIOUS

PDF

58.4 KB Created: 2021-09-17 17:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 1d58a4caca474ec732d2b7645ef2c40a SHA-1: b95403e02cef50344d5cf0ab2b5b40b7b77d03c3 SHA-256: a80ea10e027f92609cdcad7608b424fec4d820f9fda66ef2f77b86b3da18d371
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple disposable hosting sites, suggesting an attempt to distribute malware or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the download or execution of a secondary payload from one of the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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://xcheck.vn/uploads/userfiles/file/suxizovoluxigegixu.pdf In PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613f07ae7b786---bibubewexomajevut.pdfIn PDF document text
    • https://bawauang.com/contents/files/resevis.pdfIn PDF document text
    • https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/kodilezaxerumodifijonupe.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/lidam.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/84691230472.pdfIn PDF document text
    • http://48bulls.com/js/upload/files/jubiwawaxoruk.pdfIn PDF document text
    • https://granitnet.hu/editor_up/rutodev.pdfIn PDF document text
    • https://begili.com/uploads/image/files/sitodozumewiri.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/jelofepufep.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/meah6heukh7hu5lubsfspeaq6m/navagirenu.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/37008871401.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1e47bfe78---romiralesinodulotew.pdfIn PDF document text
    • http://powercleanperu.com/cms_powerclean_2015/sgi_userfiles/userfiles/files/55320733841.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/jenaganojixo.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d5ae2a876---54574088137.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/dbc81f7a19148090dd178a3ffbe8da42/18355353543.pdfIn PDF document text
    • https://moiatakashta.com/userfiles/file/xumaximixorejavumod.pdfIn PDF document text
    • http://kahasat.cz/data/file/radage.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/gogapu.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/xefevusisares.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/59847292243.pdfIn PDF document text
    • https://reniuved.it/file/81236426250.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=windows+10+iso+x64+downloadPDF link annotation

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