Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f616e45d75e575b…

MALICIOUS

PDF

65.1 KB Created: 2021-09-01 14:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 6997e39a4adafc885661ca7bec89de8f SHA-1: 1d44303cc2e7302e2172157ddcea255b7dbaf918 SHA-256: 3f616e45d75e575b30c264a4d8b943e2982dc32eb8c505a582e98d9b3cf02baa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9313

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://allytemp.ru/uplcv?utm_term=painted+hills+visitor+center PDF link annotation
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b30d89ea3ac---wasofopi.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/cf9144ebc2d8b1d9effc0631f1d54fd7/vigasasirof.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/waximujerijisoxegotala.pdfIn PDF document text
    • https://advik.net/userfiles/file/25859632808.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/81395797452.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/nesavozuremibefilez.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff0c67a258---21282637088.pdfIn PDF document text
    • http://amdind.com/userfiles/file/vageja.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c3ae45aaf---84980228031.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/gubenevitedozud.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad02cfb882b---64336475153.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/73483620995.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c048eba69---56900090487.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/botebaxitekanodowusafexe.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/34oltqsja7hgu518aglkueg9c3/moxozimuvixefazukenusunij.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/padivemuverusikigufomut.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3320cea1e---muzuvapixetugejobagapex.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/68528259272.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/jejelaxidagafagerolusapi.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/72537486457.pdfIn PDF document text
    • http://lowry-averyreunion.com/clients/c/c0/c0e4e7922159a76f956c19110b7bfeb7/File/fojolapuke.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/fowarakenibivirawipupo.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/gobikevawuzemo.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/18950388096.pdfIn PDF document text
    • https://unimedbelem.com.br/painel_template/assets/global/plugins/ckfinder/userfilesfiles/51930687308.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4A 17112 bytes
SHA-256: aba9df279c45c88653ee4bd4287a15b4bd0e168c500631a02105d50cd5e2a751