Malicious PDF — malware analysis report

Static analysis result for SHA-256 16de41176f8938e3…

MALICIOUS

PDF

80.1 KB Created: 2021-08-06 11:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ff5dadc3f1840627288109da569ab04c SHA-1: d228b4e8d5dbf27182579d724e6cc4928f42362e SHA-256: 16de41176f8938e322475aac78d65dfba6366678ee70308eb7cac845bf8eb34f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that likely lead to malicious content or phishing sites. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to compromised or disposable hosting sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9389

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://crewmak.ru/uplcv?utm_term=download+need+for+speed+most+wanted+apk+data+highly+compressed PDF link annotation
    • http://hsiwww.com/image/files/20210724_224744.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/79505308678.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/fojarujedofavore.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/ggm2a13rqcfimi6reb3hsu7713/48253324755.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/53497826886.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12e6154f93---vebulogep.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090cea8e2721---leziseginufivogejovewe.pdfIn PDF document text
    • http://cmtsport.com/pliki/91389269301.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/82abcfb99e647e9c5bf1806468e99b56/jofubofasolajexigafasi.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/tipasujewotisugodoxewo.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/e72080d53522174d372775c4c0d50093/tegakidonerasu.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/64843224561.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608a80a7455af---xesovumipago.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/fisumekotitipokakabit.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/7c0e04a733fd65bf4a6c9786d8a79715/48581567930.pdfIn PDF document text
    • http://chineseclothingonline.net/File/16215131817.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160de1977a5e1d---tokejidoxeredefelajej.pdfIn PDF document text
    • http://yildizteknikelektrik.net/resimler/files/xodamerawudijarikip.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/b310e2e9e90818d080ba5f677f18a03f/zapizodefuz.pdfIn PDF document text
    • http://geodez.com/pliki/file/bivusujafevogafu.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/88535062725.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/96m20ekt2boa59vnies5a80f54/lukoworotano.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/0edcdeb14450d309d02a6b6a65862a68/20058470115.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/037bfbdbced3f5b641f1233744c16d79/rozulukip.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/nosunoxusiwavup.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/wujan.pdfIn PDF document text

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