Malicious PDF — malware analysis report

Static analysis result for SHA-256 94605dcfba3b27c1…

MALICIOUS

PDF

78.3 KB Created: 2021-08-14 05:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 67e59a01e2b45db5d653cef53bd0a486 SHA-1: 52b5e1f7de02b805b9550ef79d171d48f4486ff8 SHA-256: 94605dcfba3b27c1109f84540fe4f10b759019afc99883fddc1ab1663487aae0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and is identified as a link farm pointing to numerous external PDF files, some hosted on compromised WordPress sites. This suggests an attempt to distribute malicious content or phish users by disguising malicious links as legitimate downloads. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9007

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://engineersclasses4competition.com/files/others/kikipuxividinikexasuw.pdf In PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/95786945584.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607526c151e33---xakuzenefozevefojelaluka.pdfIn PDF document text
    • https://hkfew.org.hk/ckfinder/userfiles/files/33939858354.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/87396402832.pdfIn PDF document text
    • http://juentai.com/userfiles/files/35834081639.pdfIn PDF document text
    • https://medicula.pl/web/uploads/files/95952557362.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/tidowukezobetit.pdfIn PDF document text
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/7223912465.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/30119289522.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/pitotibinawa.pdfIn PDF document text
    • http://klinok-saintp.ru/files/newosoga.pdfIn PDF document text
    • https://mauspro.net/upload/files/xifitobatogenajusejumekeb.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/644840d8790b31450df22a45b2c205d7/716254641.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfeb17da8d9---40347155784.pdfIn PDF document text
    • http://fruitsad.pl/images/file/50693535330.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/a22cae0b96c0484d5f0da1aff9c85653/7472155364.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160aae6d2359fd---samikidobevo.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/66068193171.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/m4fn5ui15k69fbjboqbu85ig12/tarena.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/pimozesetepexulotovokap.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/96685809946.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/6b5d7faef5484fe539429764c2de2664/jezozusugudatizulek.pdfIn PDF document text
    • https://www.upperhousedev7.com/ckfinder/userfiles/files/renizidob.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609072a1237e8---divosepotorubijibiwivefad.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a928160e236---figuvozuvor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=descargar+libro+amor+divina+locura+pdfPDF link annotation

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