Malicious PDF — malware analysis report

Static analysis result for SHA-256 7768c690c87d4843…

MALICIOUS

PDF

64.0 KB Created: 2021-08-12 04:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 49a058fa9bad0f4deec5bea4c88a4743 SHA-1: ed8806f940ee4adca1f4d42758cdf91513035507 SHA-256: 7768c690c87d4843c28392d0fe05b1cefbcc0184b5a070b8e4bcf50163e70bc3
154 Risk Score

Malware Insights

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

The PDF was identified as malicious by a machine learning classifier and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress sites hosting PDF files. The primary purpose seems to be to lure users to these external sites, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8221

Heuristics 5

  • 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.
  • 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://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/2c48ad1c1f27d8999072ff4a20fa74ab/jibuvakabebapakavavevinet.pdf In PDF document text
    • http://generaltubi.com/container/ckfiles/files/nebavebov.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/48dcfa0611b2fdc68e86b1ec908c08a9/tomipifokasosijobofot.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/5273291925.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/coq9dvmm2n6l0cba1c6mf628oc/55916144366.pdfIn PDF document text
    • https://tigapilar.com/upload/files/27281548789.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/ab8cb3e2bcbb80871ec72f1b06ce5443/jatutapedisowup.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/rojemuvag.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-7-31/20210731095636176107.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0db01a33e56dead8d3cb33c48747f15d/90510548629.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/penotubap.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/3e025d9c3fefe18211c2c028cb70fa82/daxukulogu.pdfIn PDF document text
    • http://195exim.com/datas/files/nibazafotikizigukem.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8260aec45---lemomegiremutevubexujibi.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/wolusavutepewigon.pdfIn PDF document text
    • http://bronia.org/userfiles/file/jeruwe.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2ae6ae7ec---bowumedovuxovu.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/68cm75qvejbmc8102m71dp0chv/rugagojazefowozexuweb.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/gerolel.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/56261541546.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/631bfc5f9ca5237491b24c5b4db3b67d/suzulewuvezuzizob.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ael27ksg47t2s9l5c5qupcrqlp/38560811164.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a43529162c6---nalegamuj.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/61ad2e0a88baf5768a8262ead2e2272c/47640540729.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/rulem.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160abade69a156---78487706463.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070432c0cfbb---fasasepub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=what+to+eat+to+gain+weight+fast+for+skinny+guysPDF link annotation